21411820

素因数分解:

$2^2\times 5^1\times {\mathrm{719}}^1\times {\mathrm{1489}}^1$

素因数の和:2217

約数の個数: 24

約数和(自身を含む): 45057600

約数和(自身を除く): 23645780

約数列:

[1, 2, 4, 5, 10, 20, 719, 1438, 1489, 2876, 2978, 3595, 5956, 7190, 7445, 14380, 14890, 29780, 1070591, 2141182, 4282364, 5352955, 10705910, 21411820]

約数ペア:

[(1, 21411820), (2, 10705910), (4, 5352955), (5, 4282364), (10, 2141182), (20, 1070591), (719, 29780), (1438, 14890), (1489, 14380), (2876, 7445), (2978, 7190), (3595, 5956)]