20418800

素因数分解:

$2^4\times 5^2\times {\mathrm{51047}}^1$

素因数の和:51065

約数の個数: 30

約数和(自身を含む): 49057128

約数和(自身を除く): 28638328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 51047, 102094, 204188, 255235, 408376, 510470, 816752, 1020940, 1276175, 2041880, 2552350, 4083760, 5104700, 10209400, 20418800]

約数ペア:

[(1, 20418800), (2, 10209400), (4, 5104700), (5, 4083760), (8, 2552350), (10, 2041880), (16, 1276175), (20, 1020940), (25, 816752), (40, 510470), (50, 408376), (80, 255235), (100, 204188), (200, 102094), (400, 51047)]