647537540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2490529}}^1$

素因数の和:2490551

約数の個数: 24

約数和(自身を含む): 1464431640

約数和(自身を除く): 816894100

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 2490529, 4981058, 9962116, 12452645, 24905290, 32376877, 49810580, 64753754, 129507508, 161884385, 323768770, 647537540]

約数ペア:

[(1, 647537540), (2, 323768770), (4, 161884385), (5, 129507508), (10, 64753754), (13, 49810580), (20, 32376877), (26, 24905290), (52, 12452645), (65, 9962116), (130, 4981058), (260, 2490529)]