21605660

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{56857}}^1$

素因数の和:56885

約数の個数: 24

約数和(自身を含む): 47760720

約数和(自身を除く): 26155060

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 56857, 113714, 227428, 284285, 568570, 1080283, 1137140, 2160566, 4321132, 5401415, 10802830, 21605660]

約数ペア:

[(1, 21605660), (2, 10802830), (4, 5401415), (5, 4321132), (10, 2160566), (19, 1137140), (20, 1080283), (38, 568570), (76, 284285), (95, 227428), (190, 113714), (380, 56857)]