18718115

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:279

約数の個数: 32

約数和(自身を含む): 25561536

約数和(自身を除く): 6843421

約数列:

[1, 5, 13, 37, 43, 65, 181, 185, 215, 481, 559, 905, 1591, 2353, 2405, 2795, 6697, 7783, 7955, 11765, 20683, 33485, 38915, 87061, 101179, 103415, 287971, 435305, 505895, 1439855, 3743623, 18718115]

約数ペア:

[(1, 18718115), (5, 3743623), (13, 1439855), (37, 505895), (43, 435305), (65, 287971), (181, 103415), (185, 101179), (215, 87061), (481, 38915), (559, 33485), (905, 20683), (1591, 11765), (2353, 7955), (2405, 7783), (2795, 6697)]