21728180

素因数分解:

$2^2\times 5^1\times {\mathrm{719}}^1\times {\mathrm{1511}}^1$

素因数の和:2239

約数の個数: 24

約数和(自身を含む): 45722880

約数和(自身を除く): 23994700

約数列:

[1, 2, 4, 5, 10, 20, 719, 1438, 1511, 2876, 3022, 3595, 6044, 7190, 7555, 14380, 15110, 30220, 1086409, 2172818, 4345636, 5432045, 10864090, 21728180]

約数ペア:

[(1, 21728180), (2, 10864090), (4, 5432045), (5, 4345636), (10, 2172818), (20, 1086409), (719, 30220), (1438, 15110), (1511, 14380), (2876, 7555), (3022, 7190), (3595, 6044)]