20971419

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{12641}}^1$

素因数の和:12730

約数の個数: 16

約数和(自身を含む): 32363520

約数和(自身を除く): 11392101

約数列:

[1, 3, 7, 21, 79, 237, 553, 1659, 12641, 37923, 88487, 265461, 998639, 2995917, 6990473, 20971419]

約数ペア:

[(1, 20971419), (3, 6990473), (7, 2995917), (21, 998639), (79, 265461), (237, 88487), (553, 37923), (1659, 12641)]