21903889

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{3677}}^1$

素因数の和:3744

約数の個数: 16

約数和(自身を含む): 26834688

約数和(自身を除く): 4930799

約数列:

[1, 7, 23, 37, 161, 259, 851, 3677, 5957, 25739, 84571, 136049, 591997, 952343, 3129127, 21903889]

約数ペア:

[(1, 21903889), (7, 3129127), (23, 952343), (37, 591997), (161, 136049), (259, 84571), (851, 25739), (3677, 5957)]