638528020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{937}}^1\times {\mathrm{2621}}^1$

素因数の和:3580

約数の個数: 48

約数和(自身を含む): 1446148368

約数和(自身を除く): 807620348

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 937, 1874, 2621, 3748, 4685, 5242, 9370, 10484, 12181, 13105, 18740, 24362, 26210, 34073, 48724, 52420, 60905, 68146, 121810, 136292, 170365, 243620, 340730, 681460, 2455877, 4911754, 9823508, 12279385, 24558770, 31926401, 49117540, 63852802, 127705604, 159632005, 319264010, 638528020]

約数ペア:

[(1, 638528020), (2, 319264010), (4, 159632005), (5, 127705604), (10, 63852802), (13, 49117540), (20, 31926401), (26, 24558770), (52, 12279385), (65, 9823508), (130, 4911754), (260, 2455877), (937, 681460), (1874, 340730), (2621, 243620), (3748, 170365), (4685, 136292), (5242, 121810), (9370, 68146), (10484, 60905), (12181, 52420), (13105, 48724), (18740, 34073), (24362, 26210)]