21554620

素因数分解:

$2^2\times 5^1\times {\mathrm{487}}^1\times {\mathrm{2213}}^1$

素因数の和:2709

約数の個数: 24

約数和(自身を含む): 45378144

約数和(自身を除く): 23823524

約数列:

[1, 2, 4, 5, 10, 20, 487, 974, 1948, 2213, 2435, 4426, 4870, 8852, 9740, 11065, 22130, 44260, 1077731, 2155462, 4310924, 5388655, 10777310, 21554620]

約数ペア:

[(1, 21554620), (2, 10777310), (4, 5388655), (5, 4310924), (10, 2155462), (20, 1077731), (487, 44260), (974, 22130), (1948, 11065), (2213, 9740), (2435, 8852), (4426, 4870)]