21424475

素因数分解:

$5^2\times {\mathrm{29}}^2\times {\mathrm{1019}}^1$

素因数の和:1087

約数の個数: 18

約数和(自身を含む): 27541020

約数和(自身を除く): 6116545

約数列:

[1, 5, 25, 29, 145, 725, 841, 1019, 4205, 5095, 21025, 25475, 29551, 147755, 738775, 856979, 4284895, 21424475]

約数ペア:

[(1, 21424475), (5, 4284895), (25, 856979), (29, 738775), (145, 147755), (725, 29551), (841, 25475), (1019, 21025), (4205, 5095)]