20902085

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{191}}^1\times {\mathrm{509}}^1$

素因数の和:748

約数の個数: 16

約数和(自身を含む): 25850880

約数和(自身を除く): 4948795

約数列:

[1, 5, 43, 191, 215, 509, 955, 2545, 8213, 21887, 41065, 97219, 109435, 486095, 4180417, 20902085]

約数ペア:

[(1, 20902085), (5, 4180417), (43, 486095), (191, 109435), (215, 97219), (509, 41065), (955, 21887), (2545, 8213)]