21067045

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1\times {\mathrm{571}}^1$

素因数の和:780

約数の個数: 16

約数和(自身を含む): 26028288

約数和(自身を除く): 4961243

約数列:

[1, 5, 47, 157, 235, 571, 785, 2855, 7379, 26837, 36895, 89647, 134185, 448235, 4213409, 21067045]

約数ペア:

[(1, 21067045), (5, 4213409), (47, 448235), (157, 134185), (235, 89647), (571, 36895), (785, 26837), (2855, 7379)]