20781137

素因数分解:

${\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{127}}^1\times {\mathrm{307}}^1$

素因数の和:488

約数の個数: 16

約数和(自身を含む): 23181312

約数和(自身を除く): 2400175

約数列:

[1, 13, 41, 127, 307, 533, 1651, 3991, 5207, 12587, 38989, 67691, 163631, 506857, 1598549, 20781137]

約数ペア:

[(1, 20781137), (13, 1598549), (41, 506857), (127, 163631), (307, 67691), (533, 38989), (1651, 12587), (3991, 5207)]