21917288

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{66821}}^1$

素因数の和:66868

約数の個数: 16

約数和(自身を含む): 42097860

約数和(自身を除く): 20180572

約数列:

[1, 2, 4, 8, 41, 82, 164, 328, 66821, 133642, 267284, 534568, 2739661, 5479322, 10958644, 21917288]

約数ペア:

[(1, 21917288), (2, 10958644), (4, 5479322), (8, 2739661), (41, 534568), (82, 267284), (164, 133642), (328, 66821)]