21152980

素因数分解:

$2^2\times 5^1\times {\mathrm{719}}^1\times {\mathrm{1471}}^1$

素因数の和:2199

約数の個数: 24

約数和(自身を含む): 44513280

約数和(自身を除く): 23360300

約数列:

[1, 2, 4, 5, 10, 20, 719, 1438, 1471, 2876, 2942, 3595, 5884, 7190, 7355, 14380, 14710, 29420, 1057649, 2115298, 4230596, 5288245, 10576490, 21152980]

約数ペア:

[(1, 21152980), (2, 10576490), (4, 5288245), (5, 4230596), (10, 2115298), (20, 1057649), (719, 29420), (1438, 14710), (1471, 14380), (2876, 7355), (2942, 7190), (3595, 5884)]