19878235

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{7459}}^1$

素因数の和:7518

約数の個数: 16

約数和(自身を含む): 26318880

約数和(自身を除く): 6440645

約数列:

[1, 5, 13, 41, 65, 205, 533, 2665, 7459, 37295, 96967, 305819, 484835, 1529095, 3975647, 19878235]

約数ペア:

[(1, 19878235), (5, 3975647), (13, 1529095), (41, 484835), (65, 305819), (205, 96967), (533, 37295), (2665, 7459)]