21112340

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{1597}}^1$

素因数の和:2267

約数の個数: 24

約数和(自身を含む): 44430792

約数和(自身を除く): 23318452

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 1597, 2644, 3194, 3305, 6388, 6610, 7985, 13220, 15970, 31940, 1055617, 2111234, 4222468, 5278085, 10556170, 21112340]

約数ペア:

[(1, 21112340), (2, 10556170), (4, 5278085), (5, 4222468), (10, 2111234), (20, 1055617), (661, 31940), (1322, 15970), (1597, 13220), (2644, 7985), (3194, 6610), (3305, 6388)]