89980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{409}}^1$

素因数の和:429

約数の個数: 24

約数和(自身を含む): 206640

約数和(自身を除く): 116660

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 409, 818, 1636, 2045, 4090, 4499, 8180, 8998, 17996, 22495, 44990, 89980]

約数ペア:

[(1, 89980), (2, 44990), (4, 22495), (5, 17996), (10, 8998), (11, 8180), (20, 4499), (22, 4090), (44, 2045), (55, 1636), (110, 818), (220, 409)]