259659640

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{13009}}^1$

素因数の和:13519

約数の個数: 32

約数和(自身を含む): 585450000

約数和(自身を除く): 325790360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 998, 1996, 2495, 3992, 4990, 9980, 13009, 19960, 26018, 52036, 65045, 104072, 130090, 260180, 520360, 6491491, 12982982, 25965964, 32457455, 51931928, 64914910, 129829820, 259659640]

約数ペア:

[(1, 259659640), (2, 129829820), (4, 64914910), (5, 51931928), (8, 32457455), (10, 25965964), (20, 12982982), (40, 6491491), (499, 520360), (998, 260180), (1996, 130090), (2495, 104072), (3992, 65045), (4990, 52036), (9980, 26018), (13009, 19960)]