81393815

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{20897}}^1$

素因数の和:20962

約数の個数: 16

約数和(自身を含む): 105325920

約数和(自身を除く): 23932105

約数列:

[1, 5, 19, 41, 95, 205, 779, 3895, 20897, 104485, 397043, 856777, 1985215, 4283885, 16278763, 81393815]

約数ペア:

[(1, 81393815), (5, 16278763), (19, 4283885), (41, 1985215), (95, 856777), (205, 397043), (779, 104485), (3895, 20897)]