21247029

素因数分解:

$3^4\times {\mathrm{461}}^1\times {\mathrm{569}}^1$

素因数の和:1042

約数の個数: 20

約数和(自身を含む): 31864140

約数和(自身を除く): 10617111

約数列:

[1, 3, 9, 27, 81, 461, 569, 1383, 1707, 4149, 5121, 12447, 15363, 37341, 46089, 262309, 786927, 2360781, 7082343, 21247029]

約数ペア:

[(1, 21247029), (3, 7082343), (9, 2360781), (27, 786927), (81, 262309), (461, 46089), (569, 37341), (1383, 15363), (1707, 12447), (4149, 5121)]