20350000

素因数分解:

$2^4\times 5^5\times {\mathrm{11}}^1\times {\mathrm{37}}^1$

素因数の和:81

約数の個数: 120

約数和(自身を含む): 55215216

約数和(自身を除く): 34865216

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 37, 40, 44, 50, 55, 74, 80, 88, 100, 110, 125, 148, 176, 185, 200, 220, 250, 275, 296, 370, 400, 407, 440, 500, 550, 592, 625, 740, 814, 880, 925, 1000, 1100, 1250, 1375, 1480, 1628, 1850, 2000, 2035, 2200, 2500, 2750, 2960, 3125, 3256, 3700, 4070, 4400, 4625, 5000, 5500, 6250, 6512, 6875, 7400, 8140, 9250, 10000, 10175, 11000, 12500, 13750, 14800, 16280, 18500, 20350, 22000, 23125, 25000, 27500, 32560, 34375, 37000, 40700, 46250, 50000, 50875, 55000, 68750, 74000, 81400, 92500, 101750, 110000, 115625, 137500, 162800, 185000, 203500, 231250, 254375, 275000, 370000, 407000, 462500, 508750, 550000, 814000, 925000, 1017500, 1271875, 1850000, 2035000, 2543750, 4070000, 5087500, 10175000, 20350000]

約数ペア:

[(1, 20350000), (2, 10175000), (4, 5087500), (5, 4070000), (8, 2543750), (10, 2035000), (11, 1850000), (16, 1271875), (20, 1017500), (22, 925000), (25, 814000), (37, 550000), (40, 508750), (44, 462500), (50, 407000), (55, 370000), (74, 275000), (80, 254375), (88, 231250), (100, 203500), (110, 185000), (125, 162800), (148, 137500), (176, 115625), (185, 110000), (200, 101750), (220, 92500), (250, 81400), (275, 74000), (296, 68750), (370, 55000), (400, 50875), (407, 50000), (440, 46250), (500, 40700), (550, 37000), (592, 34375), (625, 32560), (740, 27500), (814, 25000), (880, 23125), (925, 22000), (1000, 20350), (1100, 18500), (1250, 16280), (1375, 14800), (1480, 13750), (1628, 12500), (1850, 11000), (2000, 10175), (2035, 10000), (2200, 9250), (2500, 8140), (2750, 7400), (2960, 6875), (3125, 6512), (3256, 6250), (3700, 5500), (4070, 5000), (4400, 4625)]