21886180

素因数分解:

$2^2\times 5^1\times {\mathrm{431}}^1\times {\mathrm{2539}}^1$

素因数の和:2979

約数の個数: 24

約数和(自身を含む): 46085760

約数和(自身を除く): 24199580

約数列:

[1, 2, 4, 5, 10, 20, 431, 862, 1724, 2155, 2539, 4310, 5078, 8620, 10156, 12695, 25390, 50780, 1094309, 2188618, 4377236, 5471545, 10943090, 21886180]

約数ペア:

[(1, 21886180), (2, 10943090), (4, 5471545), (5, 4377236), (10, 2188618), (20, 1094309), (431, 50780), (862, 25390), (1724, 12695), (2155, 10156), (2539, 8620), (4310, 5078)]