209509720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{748249}}^1$

素因数の和:748267

約数の個数: 32

約数和(自身を含む): 538740000

約数和(自身を除く): 329230280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 748249, 1496498, 2992996, 3741245, 5237743, 5985992, 7482490, 10475486, 14964980, 20950972, 26188715, 29929960, 41901944, 52377430, 104754860, 209509720]

約数ペア:

[(1, 209509720), (2, 104754860), (4, 52377430), (5, 41901944), (7, 29929960), (8, 26188715), (10, 20950972), (14, 14964980), (20, 10475486), (28, 7482490), (35, 5985992), (40, 5237743), (56, 3741245), (70, 2992996), (140, 1496498), (280, 748249)]