20902665

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{28439}}^1$

素因数の和:28461

約数の個数: 24

約数和(自身を含む): 38905920

約数和(自身を除く): 18003255

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 28439, 85317, 142195, 199073, 426585, 597219, 995365, 1393511, 2986095, 4180533, 6967555, 20902665]

約数ペア:

[(1, 20902665), (3, 6967555), (5, 4180533), (7, 2986095), (15, 1393511), (21, 995365), (35, 597219), (49, 426585), (105, 199073), (147, 142195), (245, 85317), (735, 28439)]