18039905

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{577}}^1$

素因数の和:645

約数の個数: 24

約数和(自身を含む): 24116472

約数和(自身を除く): 6076567

約数列:

[1, 5, 13, 37, 65, 169, 185, 481, 577, 845, 2405, 2885, 6253, 7501, 21349, 31265, 37505, 97513, 106745, 277537, 487565, 1387685, 3607981, 18039905]

約数ペア:

[(1, 18039905), (5, 3607981), (13, 1387685), (37, 487565), (65, 277537), (169, 106745), (185, 97513), (481, 37505), (577, 31265), (845, 21349), (2405, 7501), (2885, 6253)]