20985340

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{2137}}^1$

素因数の和:2637

約数の個数: 24

約数和(自身を含む): 44179632

約数和(自身を除く): 23194292

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1964, 2137, 2455, 4274, 4910, 8548, 9820, 10685, 21370, 42740, 1049267, 2098534, 4197068, 5246335, 10492670, 20985340]

約数ペア:

[(1, 20985340), (2, 10492670), (4, 5246335), (5, 4197068), (10, 2098534), (20, 1049267), (491, 42740), (982, 21370), (1964, 10685), (2137, 9820), (2455, 8548), (4274, 4910)]