9890180

素因数分解:

$2^2\times 5^1\times {\mathrm{499}}^1\times {\mathrm{991}}^1$

素因数の和:1499

約数の個数: 24

約数和(自身を含む): 20832000

約数和(自身を除く): 10941820

約数列:

[1, 2, 4, 5, 10, 20, 499, 991, 998, 1982, 1996, 2495, 3964, 4955, 4990, 9910, 9980, 19820, 494509, 989018, 1978036, 2472545, 4945090, 9890180]

約数ペア:

[(1, 9890180), (2, 4945090), (4, 2472545), (5, 1978036), (10, 989018), (20, 494509), (499, 19820), (991, 9980), (998, 9910), (1982, 4990), (1996, 4955), (2495, 3964)]