21162220

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^2\times {\mathrm{479}}^1$

素因数の和:582

約数の個数: 36

約数和(自身を含む): 45501120

約数和(自身を除く): 24338900

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 479, 940, 958, 1916, 2209, 2395, 4418, 4790, 8836, 9580, 11045, 22090, 22513, 44180, 45026, 90052, 112565, 225130, 450260, 1058111, 2116222, 4232444, 5290555, 10581110, 21162220]

約数ペア:

[(1, 21162220), (2, 10581110), (4, 5290555), (5, 4232444), (10, 2116222), (20, 1058111), (47, 450260), (94, 225130), (188, 112565), (235, 90052), (470, 45026), (479, 44180), (940, 22513), (958, 22090), (1916, 11045), (2209, 9580), (2395, 8836), (4418, 4790)]