28327820

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{17929}}^1$

素因数の和:18017

約数の個数: 24

約数和(自身を含む): 60244800

約数和(自身を除く): 31916980

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 17929, 35858, 71716, 89645, 179290, 358580, 1416391, 2832782, 5665564, 7081955, 14163910, 28327820]

約数ペア:

[(1, 28327820), (2, 14163910), (4, 7081955), (5, 5665564), (10, 2832782), (20, 1416391), (79, 358580), (158, 179290), (316, 89645), (395, 71716), (790, 35858), (1580, 17929)]