21217940

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9733}}^1$

素因数の和:9851

約数の個数: 24

約数和(自身を含む): 44971080

約数和(自身を除く): 23753140

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9733, 19466, 38932, 48665, 97330, 194660, 1060897, 2121794, 4243588, 5304485, 10608970, 21217940]

約数ペア:

[(1, 21217940), (2, 10608970), (4, 5304485), (5, 4243588), (10, 2121794), (20, 1060897), (109, 194660), (218, 97330), (436, 48665), (545, 38932), (1090, 19466), (2180, 9733)]