21299050

素因数分解:

$2^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{397}}^1$

素因数の和:475

約数の個数: 48

約数和(自身を含む): 42195960

約数和(自身を除く): 20896910

約数列:

[1, 2, 5, 10, 25, 29, 37, 50, 58, 74, 145, 185, 290, 370, 397, 725, 794, 925, 1073, 1450, 1850, 1985, 2146, 3970, 5365, 9925, 10730, 11513, 14689, 19850, 23026, 26825, 29378, 53650, 57565, 73445, 115130, 146890, 287825, 367225, 425981, 575650, 734450, 851962, 2129905, 4259810, 10649525, 21299050]

約数ペア:

[(1, 21299050), (2, 10649525), (5, 4259810), (10, 2129905), (25, 851962), (29, 734450), (37, 575650), (50, 425981), (58, 367225), (74, 287825), (145, 146890), (185, 115130), (290, 73445), (370, 57565), (397, 53650), (725, 29378), (794, 26825), (925, 23026), (1073, 19850), (1450, 14689), (1850, 11513), (1985, 10730), (2146, 9925), (3970, 5365)]