20478237

素因数分解:

$3^1\times {\mathrm{13}}^4\times {\mathrm{239}}^1$

素因数の和:294

約数の個数: 20

約数和(自身を含む): 29703360

約数和(自身を除く): 9225123

約数列:

[1, 3, 13, 39, 169, 239, 507, 717, 2197, 3107, 6591, 9321, 28561, 40391, 85683, 121173, 525083, 1575249, 6826079, 20478237]

約数ペア:

[(1, 20478237), (3, 6826079), (13, 1575249), (39, 525083), (169, 121173), (239, 85683), (507, 40391), (717, 28561), (2197, 9321), (3107, 6591)]