20505519

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{223}}^1\times {\mathrm{601}}^1$

素因数の和:847

約数の個数: 24

約数和(自身を含む): 31554432

約数和(自身を除く): 11048913

約数列:

[1, 3, 9, 17, 51, 153, 223, 601, 669, 1803, 2007, 3791, 5409, 10217, 11373, 30651, 34119, 91953, 134023, 402069, 1206207, 2278391, 6835173, 20505519]

約数ペア:

[(1, 20505519), (3, 6835173), (9, 2278391), (17, 1206207), (51, 402069), (153, 134023), (223, 91953), (601, 34119), (669, 30651), (1803, 11373), (2007, 10217), (3791, 5409)]