2175640

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{499}}^1$

素因数の和:619

約数の個数: 32

約数和(自身を含む): 4950000

約数和(自身を除く): 2774360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 499, 545, 872, 998, 1090, 1996, 2180, 2495, 3992, 4360, 4990, 9980, 19960, 54391, 108782, 217564, 271955, 435128, 543910, 1087820, 2175640]

約数ペア:

[(1, 2175640), (2, 1087820), (4, 543910), (5, 435128), (8, 271955), (10, 217564), (20, 108782), (40, 54391), (109, 19960), (218, 9980), (436, 4990), (499, 4360), (545, 3992), (872, 2495), (998, 2180), (1090, 1996)]