20915492

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{402221}}^1$

素因数の和:402238

約数の個数: 12

約数和(自身を含む): 39417756

約数和(自身を除く): 18502264

約数列:

[1, 2, 4, 13, 26, 52, 402221, 804442, 1608884, 5228873, 10457746, 20915492]

約数ペア:

[(1, 20915492), (2, 10457746), (4, 5228873), (13, 1608884), (26, 804442), (52, 402221)]