20020000

素因数分解:

$2^5\times 5^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1$

素因数の和:61

約数の個数: 240

約数和(自身を含む): 66128832

約数和(自身を除く): 46108832

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 20, 22, 25, 26, 28, 32, 35, 40, 44, 50, 52, 55, 56, 65, 70, 77, 80, 88, 91, 100, 104, 110, 112, 125, 130, 140, 143, 154, 160, 175, 176, 182, 200, 208, 220, 224, 250, 260, 275, 280, 286, 308, 325, 350, 352, 364, 385, 400, 416, 440, 455, 500, 520, 550, 560, 572, 616, 625, 650, 700, 715, 728, 770, 800, 875, 880, 910, 1000, 1001, 1040, 1100, 1120, 1144, 1232, 1250, 1300, 1375, 1400, 1430, 1456, 1540, 1625, 1750, 1760, 1820, 1925, 2000, 2002, 2080, 2200, 2275, 2288, 2464, 2500, 2600, 2750, 2800, 2860, 2912, 3080, 3250, 3500, 3575, 3640, 3850, 4000, 4004, 4375, 4400, 4550, 4576, 5000, 5005, 5200, 5500, 5600, 5720, 6160, 6500, 6875, 7000, 7150, 7280, 7700, 8008, 8125, 8750, 8800, 9100, 9625, 10000, 10010, 10400, 11000, 11375, 11440, 12320, 13000, 13750, 14000, 14300, 14560, 15400, 16016, 16250, 17500, 17875, 18200, 19250, 20000, 20020, 22000, 22750, 22880, 25025, 26000, 27500, 28000, 28600, 30800, 32032, 32500, 35000, 35750, 36400, 38500, 40040, 44000, 45500, 48125, 50050, 52000, 55000, 56875, 57200, 61600, 65000, 70000, 71500, 72800, 77000, 80080, 89375, 91000, 96250, 100100, 110000, 113750, 114400, 125125, 130000, 140000, 143000, 154000, 160160, 178750, 182000, 192500, 200200, 220000, 227500, 250250, 260000, 286000, 308000, 357500, 364000, 385000, 400400, 455000, 500500, 572000, 625625, 715000, 770000, 800800, 910000, 1001000, 1251250, 1430000, 1540000, 1820000, 2002000, 2502500, 2860000, 4004000, 5005000, 10010000, 20020000]

約数ペア:

[(1, 20020000), (2, 10010000), (4, 5005000), (5, 4004000), (7, 2860000), (8, 2502500), (10, 2002000), (11, 1820000), (13, 1540000), (14, 1430000), (16, 1251250), (20, 1001000), (22, 910000), (25, 800800), (26, 770000), (28, 715000), (32, 625625), (35, 572000), (40, 500500), (44, 455000), (50, 400400), (52, 385000), (55, 364000), (56, 357500), (65, 308000), (70, 286000), (77, 260000), (80, 250250), (88, 227500), (91, 220000), (100, 200200), (104, 192500), (110, 182000), (112, 178750), (125, 160160), (130, 154000), (140, 143000), (143, 140000), (154, 130000), (160, 125125), (175, 114400), (176, 113750), (182, 110000), (200, 100100), (208, 96250), (220, 91000), (224, 89375), (250, 80080), (260, 77000), (275, 72800), (280, 71500), (286, 70000), (308, 65000), (325, 61600), (350, 57200), (352, 56875), (364, 55000), (385, 52000), (400, 50050), (416, 48125), (440, 45500), (455, 44000), (500, 40040), (520, 38500), (550, 36400), (560, 35750), (572, 35000), (616, 32500), (625, 32032), (650, 30800), (700, 28600), (715, 28000), (728, 27500), (770, 26000), (800, 25025), (875, 22880), (880, 22750), (910, 22000), (1000, 20020), (1001, 20000), (1040, 19250), (1100, 18200), (1120, 17875), (1144, 17500), (1232, 16250), (1250, 16016), (1300, 15400), (1375, 14560), (1400, 14300), (1430, 14000), (1456, 13750), (1540, 13000), (1625, 12320), (1750, 11440), (1760, 11375), (1820, 11000), (1925, 10400), (2000, 10010), (2002, 10000), (2080, 9625), (2200, 9100), (2275, 8800), (2288, 8750), (2464, 8125), (2500, 8008), (2600, 7700), (2750, 7280), (2800, 7150), (2860, 7000), (2912, 6875), (3080, 6500), (3250, 6160), (3500, 5720), (3575, 5600), (3640, 5500), (3850, 5200), (4000, 5005), (4004, 5000), (4375, 4576), (4400, 4550)]