21660220

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13709}}^1$

素因数の和:13797

約数の個数: 24

約数和(自身を含む): 46065600

約数和(自身を除く): 24405380

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13709, 27418, 54836, 68545, 137090, 274180, 1083011, 2166022, 4332044, 5415055, 10830110, 21660220]

約数ペア:

[(1, 21660220), (2, 10830110), (4, 5415055), (5, 4332044), (10, 2166022), (20, 1083011), (79, 274180), (158, 137090), (316, 68545), (395, 54836), (790, 27418), (1580, 13709)]