20118280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{5527}}^1$

素因数の和:5558

約数の個数: 64

約数和(自身を含む): 55722240

約数和(自身を除く): 35603960

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 140, 182, 260, 280, 364, 455, 520, 728, 910, 1820, 3640, 5527, 11054, 22108, 27635, 38689, 44216, 55270, 71851, 77378, 110540, 143702, 154756, 193445, 221080, 287404, 309512, 359255, 386890, 502957, 574808, 718510, 773780, 1005914, 1437020, 1547560, 2011828, 2514785, 2874040, 4023656, 5029570, 10059140, 20118280]

約数ペア:

[(1, 20118280), (2, 10059140), (4, 5029570), (5, 4023656), (7, 2874040), (8, 2514785), (10, 2011828), (13, 1547560), (14, 1437020), (20, 1005914), (26, 773780), (28, 718510), (35, 574808), (40, 502957), (52, 386890), (56, 359255), (65, 309512), (70, 287404), (91, 221080), (104, 193445), (130, 154756), (140, 143702), (182, 110540), (260, 77378), (280, 71851), (364, 55270), (455, 44216), (520, 38689), (728, 27635), (910, 22108), (1820, 11054), (3640, 5527)]