21785660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83791}}^1$

素因数の和:83813

約数の個数: 24

約数和(自身を含む): 49269696

約数和(自身を除く): 27484036

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 83791, 167582, 335164, 418955, 837910, 1089283, 1675820, 2178566, 4357132, 5446415, 10892830, 21785660]

約数ペア:

[(1, 21785660), (2, 10892830), (4, 5446415), (5, 4357132), (10, 2178566), (13, 1675820), (20, 1089283), (26, 837910), (52, 418955), (65, 335164), (130, 167582), (260, 83791)]