20676275

素因数分解:

$5^2\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{79}}^1$

素因数の和:156

約数の個数: 36

約数和(自身を含む): 28346400

約数和(自身を除く): 7670125

約数列:

[1, 5, 19, 25, 29, 79, 95, 145, 361, 395, 475, 551, 725, 1501, 1805, 1975, 2291, 2755, 7505, 9025, 10469, 11455, 13775, 28519, 37525, 43529, 52345, 57275, 142595, 217645, 261725, 712975, 827051, 1088225, 4135255, 20676275]

約数ペア:

[(1, 20676275), (5, 4135255), (19, 1088225), (25, 827051), (29, 712975), (79, 261725), (95, 217645), (145, 142595), (361, 57275), (395, 52345), (475, 43529), (551, 37525), (725, 28519), (1501, 13775), (1805, 11455), (1975, 10469), (2291, 9025), (2755, 7505)]