21610640

素因数分解:

$2^4\times 5^1\times {\mathrm{270133}}^1$

素因数の和:270146

約数の個数: 20

約数和(自身を含む): 50244924

約数和(自身を除く): 28634284

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 270133, 540266, 1080532, 1350665, 2161064, 2701330, 4322128, 5402660, 10805320, 21610640]

約数ペア:

[(1, 21610640), (2, 10805320), (4, 5402660), (5, 4322128), (8, 2701330), (10, 2161064), (16, 1350665), (20, 1080532), (40, 540266), (80, 270133)]