18917015

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{367}}^1$

素因数の和:459

約数の個数: 24

約数和(自身を含む): 25051968

約数和(自身を除く): 6134953

約数列:

[1, 5, 13, 61, 65, 169, 305, 367, 793, 845, 1835, 3965, 4771, 10309, 22387, 23855, 51545, 62023, 111935, 291031, 310115, 1455155, 3783403, 18917015]

約数ペア:

[(1, 18917015), (5, 3783403), (13, 1455155), (61, 310115), (65, 291031), (169, 111935), (305, 62023), (367, 51545), (793, 23855), (845, 22387), (1835, 10309), (3965, 4771)]