20390517

素因数分解:

$3^2\times 7^2\times {\mathrm{46237}}^1$

素因数の和:46257

約数の個数: 18

約数和(自身を含む): 34262358

約数和(自身を除く): 13871841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 46237, 138711, 323659, 416133, 970977, 2265613, 2912931, 6796839, 20390517]

約数ペア:

[(1, 20390517), (3, 6796839), (7, 2912931), (9, 2265613), (21, 970977), (49, 416133), (63, 323659), (147, 138711), (441, 46237)]