28245220

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19891}}^1$

素因数の和:19971

約数の個数: 24

約数和(自身を含む): 60153408

約数和(自身を除く): 31908188

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 19891, 39782, 79564, 99455, 198910, 397820, 1412261, 2824522, 5649044, 7061305, 14122610, 28245220]

約数ペア:

[(1, 28245220), (2, 14122610), (4, 7061305), (5, 5649044), (10, 2824522), (20, 1412261), (71, 397820), (142, 198910), (284, 99455), (355, 79564), (710, 39782), (1420, 19891)]