21966640

素因数分解:

$2^4\times 5^1\times {\mathrm{274583}}^1$

素因数の和:274596

約数の個数: 20

約数和(自身を含む): 51072624

約数和(自身を除く): 29105984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 274583, 549166, 1098332, 1372915, 2196664, 2745830, 4393328, 5491660, 10983320, 21966640]

約数ペア:

[(1, 21966640), (2, 10983320), (4, 5491660), (5, 4393328), (8, 2745830), (10, 2196664), (16, 1372915), (20, 1098332), (40, 549166), (80, 274583)]