20399755

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{191}}^1\times {\mathrm{521}}^1$

素因数の和:758

約数の個数: 16

約数和(自身を含む): 25256448

約数和(自身を除く): 4856693

約数列:

[1, 5, 41, 191, 205, 521, 955, 2605, 7831, 21361, 39155, 99511, 106805, 497555, 4079951, 20399755]

約数ペア:

[(1, 20399755), (5, 4079951), (41, 497555), (191, 106805), (205, 99511), (521, 39155), (955, 21361), (2605, 7831)]