665068820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2557957}}^1$

素因数の和:2557979

約数の個数: 24

約数和(自身を含む): 1504079304

約数和(自身を除く): 839010484

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 2557957, 5115914, 10231828, 12789785, 25579570, 33253441, 51159140, 66506882, 133013764, 166267205, 332534410, 665068820]

約数ペア:

[(1, 665068820), (2, 332534410), (4, 166267205), (5, 133013764), (10, 66506882), (13, 51159140), (20, 33253441), (26, 25579570), (52, 12789785), (65, 10231828), (130, 5115914), (260, 2557957)]