20640945

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{701}}^1$

素因数の和:873

約数の個数: 32

約数和(自身を含む): 35852544

約数和(自身を除く): 15211599

約数列:

[1, 3, 5, 13, 15, 39, 65, 151, 195, 453, 701, 755, 1963, 2103, 2265, 3505, 5889, 9113, 9815, 10515, 27339, 29445, 45565, 105851, 136695, 317553, 529255, 1376063, 1587765, 4128189, 6880315, 20640945]

約数ペア:

[(1, 20640945), (3, 6880315), (5, 4128189), (13, 1587765), (15, 1376063), (39, 529255), (65, 317553), (151, 136695), (195, 105851), (453, 45565), (701, 29445), (755, 27339), (1963, 10515), (2103, 9815), (2265, 9113), (3505, 5889)]