400500000

素因数分解:

$2^5\times 3^2\times 5^6\times {\mathrm{89}}^1$

素因数の和:135

約数の個数: 252

約数和(自身を含む): 1439630010

約数和(自身を除く): 1039130010

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 30, 32, 36, 40, 45, 48, 50, 60, 72, 75, 80, 89, 90, 96, 100, 120, 125, 144, 150, 160, 178, 180, 200, 225, 240, 250, 267, 288, 300, 356, 360, 375, 400, 445, 450, 480, 500, 534, 600, 625, 712, 720, 750, 800, 801, 890, 900, 1000, 1068, 1125, 1200, 1250, 1335, 1424, 1440, 1500, 1602, 1780, 1800, 1875, 2000, 2136, 2225, 2250, 2400, 2500, 2670, 2848, 3000, 3125, 3204, 3560, 3600, 3750, 4000, 4005, 4272, 4450, 4500, 5000, 5340, 5625, 6000, 6250, 6408, 6675, 7120, 7200, 7500, 8010, 8544, 8900, 9000, 9375, 10000, 10680, 11125, 11250, 12000, 12500, 12816, 13350, 14240, 15000, 15625, 16020, 17800, 18000, 18750, 20000, 20025, 21360, 22250, 22500, 25000, 25632, 26700, 28125, 30000, 31250, 32040, 33375, 35600, 36000, 37500, 40050, 42720, 44500, 45000, 46875, 50000, 53400, 55625, 56250, 60000, 62500, 64080, 66750, 71200, 75000, 80100, 89000, 90000, 93750, 100000, 100125, 106800, 111250, 112500, 125000, 128160, 133500, 140625, 150000, 160200, 166875, 178000, 180000, 187500, 200250, 213600, 222500, 225000, 250000, 267000, 278125, 281250, 300000, 320400, 333750, 356000, 375000, 400500, 445000, 450000, 500000, 500625, 534000, 556250, 562500, 640800, 667500, 750000, 801000, 834375, 890000, 900000, 1001250, 1068000, 1112500, 1125000, 1335000, 1390625, 1500000, 1602000, 1668750, 1780000, 2002500, 2225000, 2250000, 2503125, 2670000, 2781250, 3204000, 3337500, 4005000, 4171875, 4450000, 4500000, 5006250, 5340000, 5562500, 6675000, 8010000, 8343750, 8900000, 10012500, 11125000, 12515625, 13350000, 16020000, 16687500, 20025000, 22250000, 25031250, 26700000, 33375000, 40050000, 44500000, 50062500, 66750000, 80100000, 100125000, 133500000, 200250000, 400500000]

約数ペア:

[(1, 400500000), (2, 200250000), (3, 133500000), (4, 100125000), (5, 80100000), (6, 66750000), (8, 50062500), (9, 44500000), (10, 40050000), (12, 33375000), (15, 26700000), (16, 25031250), (18, 22250000), (20, 20025000), (24, 16687500), (25, 16020000), (30, 13350000), (32, 12515625), (36, 11125000), (40, 10012500), (45, 8900000), (48, 8343750), (50, 8010000), (60, 6675000), (72, 5562500), (75, 5340000), (80, 5006250), (89, 4500000), (90, 4450000), (96, 4171875), (100, 4005000), (120, 3337500), (125, 3204000), (144, 2781250), (150, 2670000), (160, 2503125), (178, 2250000), (180, 2225000), (200, 2002500), (225, 1780000), (240, 1668750), (250, 1602000), (267, 1500000), (288, 1390625), (300, 1335000), (356, 1125000), (360, 1112500), (375, 1068000), (400, 1001250), (445, 900000), (450, 890000), (480, 834375), (500, 801000), (534, 750000), (600, 667500), (625, 640800), (712, 562500), (720, 556250), (750, 534000), (800, 500625), (801, 500000), (890, 450000), (900, 445000), (1000, 400500), (1068, 375000), (1125, 356000), (1200, 333750), (1250, 320400), (1335, 300000), (1424, 281250), (1440, 278125), (1500, 267000), (1602, 250000), (1780, 225000), (1800, 222500), (1875, 213600), (2000, 200250), (2136, 187500), (2225, 180000), (2250, 178000), (2400, 166875), (2500, 160200), (2670, 150000), (2848, 140625), (3000, 133500), (3125, 128160), (3204, 125000), (3560, 112500), (3600, 111250), (3750, 106800), (4000, 100125), (4005, 100000), (4272, 93750), (4450, 90000), (4500, 89000), (5000, 80100), (5340, 75000), (5625, 71200), (6000, 66750), (6250, 64080), (6408, 62500), (6675, 60000), (7120, 56250), (7200, 55625), (7500, 53400), (8010, 50000), (8544, 46875), (8900, 45000), (9000, 44500), (9375, 42720), (10000, 40050), (10680, 37500), (11125, 36000), (11250, 35600), (12000, 33375), (12500, 32040), (12816, 31250), (13350, 30000), (14240, 28125), (15000, 26700), (15625, 25632), (16020, 25000), (17800, 22500), (18000, 22250), (18750, 21360), (20000, 20025)]