21729812

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{417881}}^1$

素因数の和:417898

約数の個数: 12

約数和(自身を含む): 40952436

約数和(自身を除く): 19222624

約数列:

[1, 2, 4, 13, 26, 52, 417881, 835762, 1671524, 5432453, 10864906, 21729812]

約数ペア:

[(1, 21729812), (2, 10864906), (4, 5432453), (13, 1671524), (26, 835762), (52, 417881)]