19993665

素因数分解:

$3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{21851}}^1$

素因数の和:21920

約数の個数: 16

約数和(自身を含む): 32515776

約数和(自身を除く): 12522111

約数列:

[1, 3, 5, 15, 61, 183, 305, 915, 21851, 65553, 109255, 327765, 1332911, 3998733, 6664555, 19993665]

約数ペア:

[(1, 19993665), (3, 6664555), (5, 3998733), (15, 1332911), (61, 327765), (183, 109255), (305, 65553), (915, 21851)]