21155726

素因数分解:

$2^1\times {\mathrm{79}}^1\times {\mathrm{257}}^1\times {\mathrm{521}}^1$

素因数の和:859

約数の個数: 16

約数和(自身を含む): 32322240

約数和(自身を除く): 11166514

約数列:

[1, 2, 79, 158, 257, 514, 521, 1042, 20303, 40606, 41159, 82318, 133897, 267794, 10577863, 21155726]

約数ペア:

[(1, 21155726), (2, 10577863), (79, 267794), (158, 133897), (257, 82318), (514, 41159), (521, 40606), (1042, 20303)]