19999021

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{4099}}^1$

素因数の和:4164

約数の個数: 16

約数和(自身を含む): 24796800

約数和(自身を除く): 4797779

約数列:

[1, 7, 17, 41, 119, 287, 697, 4099, 4879, 28693, 69683, 168059, 487781, 1176413, 2857003, 19999021]

約数ペア:

[(1, 19999021), (7, 2857003), (17, 1176413), (41, 487781), (119, 168059), (287, 69683), (697, 28693), (4099, 4879)]