9991640

素因数分解:

$2^3\times 5^1\times {\mathrm{439}}^1\times {\mathrm{569}}^1$

素因数の和:1019

約数の個数: 32

約数和(自身を含む): 22572000

約数和(自身を除く): 12580360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 439, 569, 878, 1138, 1756, 2195, 2276, 2845, 3512, 4390, 4552, 5690, 8780, 11380, 17560, 22760, 249791, 499582, 999164, 1248955, 1998328, 2497910, 4995820, 9991640]

約数ペア:

[(1, 9991640), (2, 4995820), (4, 2497910), (5, 1998328), (8, 1248955), (10, 999164), (20, 499582), (40, 249791), (439, 22760), (569, 17560), (878, 11380), (1138, 8780), (1756, 5690), (2195, 4552), (2276, 4390), (2845, 3512)]