21377390

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{30109}}^1$

素因数の和:30187

約数の個数: 16

約数和(自身を含む): 39022560

約数和(自身を除く): 17645170

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 30109, 60218, 150545, 301090, 2137739, 4275478, 10688695, 21377390]

約数ペア:

[(1, 21377390), (2, 10688695), (5, 4275478), (10, 2137739), (71, 301090), (142, 150545), (355, 60218), (710, 30109)]