21718390

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{74891}}^1$

素因数の和:74927

約数の個数: 16

約数和(自身を含む): 40441680

約数和(自身を除く): 18723290

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 74891, 149782, 374455, 748910, 2171839, 4343678, 10859195, 21718390]

約数ペア:

[(1, 21718390), (2, 10859195), (5, 4343678), (10, 2171839), (29, 748910), (58, 374455), (145, 149782), (290, 74891)]