21406510

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{479}}^1$

素因数の和:636

約数の個数: 32

約数和(自身を含む): 39916800

約数和(自身を除く): 18510290

約数列:

[1, 2, 5, 10, 41, 82, 109, 205, 218, 410, 479, 545, 958, 1090, 2395, 4469, 4790, 8938, 19639, 22345, 39278, 44690, 52211, 98195, 104422, 196390, 261055, 522110, 2140651, 4281302, 10703255, 21406510]

約数ペア:

[(1, 21406510), (2, 10703255), (5, 4281302), (10, 2140651), (41, 522110), (82, 261055), (109, 196390), (205, 104422), (218, 98195), (410, 52211), (479, 44690), (545, 39278), (958, 22345), (1090, 19639), (2395, 8938), (4469, 4790)]