9991780

素因数分解:

$2^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{2791}}^1$

素因数の和:2979

約数の個数: 24

約数和(自身を含む): 21107520

約数和(自身を除く): 11115740

約数列:

[1, 2, 4, 5, 10, 20, 179, 358, 716, 895, 1790, 2791, 3580, 5582, 11164, 13955, 27910, 55820, 499589, 999178, 1998356, 2497945, 4995890, 9991780]

約数ペア:

[(1, 9991780), (2, 4995890), (4, 2497945), (5, 1998356), (10, 999178), (20, 499589), (179, 55820), (358, 27910), (716, 13955), (895, 11164), (1790, 5582), (2791, 3580)]