20921510

素因数分解:

$2^1\times 5^1\times {\mathrm{491}}^1\times {\mathrm{4261}}^1$

素因数の和:4759

約数の個数: 16

約数和(自身を含む): 37744272

約数和(自身を除く): 16822762

約数列:

[1, 2, 5, 10, 491, 982, 2455, 4261, 4910, 8522, 21305, 42610, 2092151, 4184302, 10460755, 20921510]

約数ペア:

[(1, 20921510), (2, 10460755), (5, 4184302), (10, 2092151), (491, 42610), (982, 21305), (2455, 8522), (4261, 4910)]