21388740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{356479}}^1$

素因数の和:356491

約数の個数: 24

約数和(自身を含む): 59888640

約数和(自身を除く): 38499900

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 356479, 712958, 1069437, 1425916, 1782395, 2138874, 3564790, 4277748, 5347185, 7129580, 10694370, 21388740]

約数ペア:

[(1, 21388740), (2, 10694370), (3, 7129580), (4, 5347185), (5, 4277748), (6, 3564790), (10, 2138874), (12, 1782395), (15, 1425916), (20, 1069437), (30, 712958), (60, 356479)]