18891275

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1571}}^1$

素因数の和:1631

約数の個数: 24

約数和(自身を含む): 25925424

約数和(自身を除く): 7034149

約数列:

[1, 5, 13, 25, 37, 65, 185, 325, 481, 925, 1571, 2405, 7855, 12025, 20423, 39275, 58127, 102115, 290635, 510575, 755651, 1453175, 3778255, 18891275]

約数ペア:

[(1, 18891275), (5, 3778255), (13, 1453175), (25, 755651), (37, 510575), (65, 290635), (185, 102115), (325, 58127), (481, 39275), (925, 20423), (1571, 12025), (2405, 7855)]