18161221

素因数分解:

${\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{719}}^1$

素因数の和:828

約数の個数: 16

約数和(自身を含む): 20563200

約数和(自身を除く): 2401979

約数列:

[1, 13, 29, 67, 377, 719, 871, 1943, 9347, 20851, 25259, 48173, 271063, 626249, 1397017, 18161221]

約数ペア:

[(1, 18161221), (13, 1397017), (29, 626249), (67, 271063), (377, 48173), (719, 25259), (871, 20851), (1943, 9347)]