20911690

素因数分解:

$2^1\times 5^1\times {\mathrm{491}}^1\times {\mathrm{4259}}^1$

素因数の和:4757

約数の個数: 16

約数和(自身を含む): 37726560

約数和(自身を除く): 16814870

約数列:

[1, 2, 5, 10, 491, 982, 2455, 4259, 4910, 8518, 21295, 42590, 2091169, 4182338, 10455845, 20911690]

約数ペア:

[(1, 20911690), (2, 10455845), (5, 4182338), (10, 2091169), (491, 42590), (982, 21295), (2455, 8518), (4259, 4910)]