8421340

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{3863}}^1$

素因数の和:3981

約数の個数: 24

約数和(自身を含む): 17851680

約数和(自身を除く): 9430340

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 3863, 7726, 15452, 19315, 38630, 77260, 421067, 842134, 1684268, 2105335, 4210670, 8421340]

約数ペア:

[(1, 8421340), (2, 4210670), (4, 2105335), (5, 1684268), (10, 842134), (20, 421067), (109, 77260), (218, 38630), (436, 19315), (545, 15452), (1090, 7726), (2180, 3863)]