20457740

素因数分解:

$2^2\times 5^1\times {\mathrm{443}}^1\times {\mathrm{2309}}^1$

素因数の和:2761

約数の個数: 24

約数和(自身を含む): 43076880

約数和(自身を除く): 22619140

約数列:

[1, 2, 4, 5, 10, 20, 443, 886, 1772, 2215, 2309, 4430, 4618, 8860, 9236, 11545, 23090, 46180, 1022887, 2045774, 4091548, 5114435, 10228870, 20457740]

約数ペア:

[(1, 20457740), (2, 10228870), (4, 5114435), (5, 4091548), (10, 2045774), (20, 1022887), (443, 46180), (886, 23090), (1772, 11545), (2215, 9236), (2309, 8860), (4430, 4618)]