20216781

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{2579}}^1$

素因数の和:2665

約数の個数: 24

約数和(自身を含む): 31930080

約数和(自身を除く): 11713299

約数列:

[1, 3, 9, 13, 39, 67, 117, 201, 603, 871, 2579, 2613, 7737, 7839, 23211, 33527, 100581, 172793, 301743, 518379, 1555137, 2246309, 6738927, 20216781]

約数ペア:

[(1, 20216781), (3, 6738927), (9, 2246309), (13, 1555137), (39, 518379), (67, 301743), (117, 172793), (201, 100581), (603, 33527), (871, 23211), (2579, 7839), (2613, 7737)]