28123640

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{1409}}^1$

素因数の和:1919

約数の個数: 32

約数和(自身を含む): 63450000

約数和(自身を除く): 35326360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 998, 1409, 1996, 2495, 2818, 3992, 4990, 5636, 7045, 9980, 11272, 14090, 19960, 28180, 56360, 703091, 1406182, 2812364, 3515455, 5624728, 7030910, 14061820, 28123640]

約数ペア:

[(1, 28123640), (2, 14061820), (4, 7030910), (5, 5624728), (8, 3515455), (10, 2812364), (20, 1406182), (40, 703091), (499, 56360), (998, 28180), (1409, 19960), (1996, 14090), (2495, 11272), (2818, 9980), (3992, 7045), (4990, 5636)]