12756400

素因数分解:

$2^4\times 5^2\times {\mathrm{31891}}^1$

素因数の和:31909

約数の個数: 30

約数和(自身を含む): 30648212

約数和(自身を除く): 17891812

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 31891, 63782, 127564, 159455, 255128, 318910, 510256, 637820, 797275, 1275640, 1594550, 2551280, 3189100, 6378200, 12756400]

約数ペア:

[(1, 12756400), (2, 6378200), (4, 3189100), (5, 2551280), (8, 1594550), (10, 1275640), (16, 797275), (20, 637820), (25, 510256), (40, 318910), (50, 255128), (80, 159455), (100, 127564), (200, 63782), (400, 31891)]