21509733

素因数分解:

$3^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{9397}}^1$

素因数の和:9516

約数の個数: 16

約数和(自身を含む): 33080960

約数和(自身を除く): 11571227

約数列:

[1, 3, 7, 21, 109, 327, 763, 2289, 9397, 28191, 65779, 197337, 1024273, 3072819, 7169911, 21509733]

約数ペア:

[(1, 21509733), (3, 7169911), (7, 3072819), (21, 1024273), (109, 197337), (327, 65779), (763, 28191), (2289, 9397)]