21105940

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{5303}}^1$

素因数の和:5511

約数の個数: 24

約数和(自身を含む): 44553600

約数和(自身を除く): 23447660

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980, 5303, 10606, 21212, 26515, 53030, 106060, 1055297, 2110594, 4221188, 5276485, 10552970, 21105940]

約数ペア:

[(1, 21105940), (2, 10552970), (4, 5276485), (5, 4221188), (10, 2110594), (20, 1055297), (199, 106060), (398, 53030), (796, 26515), (995, 21212), (1990, 10606), (3980, 5303)]