21909476

素因数分解:

$2^2\times {\mathrm{37}}^2\times {\mathrm{4001}}^1$

素因数の和:4079

約数の個数: 18

約数和(自身を含む): 39415698

約数和(自身を除く): 17506222

約数列:

[1, 2, 4, 37, 74, 148, 1369, 2738, 4001, 5476, 8002, 16004, 148037, 296074, 592148, 5477369, 10954738, 21909476]

約数ペア:

[(1, 21909476), (2, 10954738), (4, 5477369), (37, 592148), (74, 296074), (148, 148037), (1369, 16004), (2738, 8002), (4001, 5476)]