21260415

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{269}}^1\times {\mathrm{479}}^1$

素因数の和:767

約数の個数: 32

約数和(自身を含む): 37324800

約数和(自身を除く): 16064385

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 269, 479, 807, 1345, 1437, 2395, 2959, 4035, 5269, 7185, 8877, 14795, 15807, 26345, 44385, 79035, 128851, 386553, 644255, 1417361, 1932765, 4252083, 7086805, 21260415]

約数ペア:

[(1, 21260415), (3, 7086805), (5, 4252083), (11, 1932765), (15, 1417361), (33, 644255), (55, 386553), (165, 128851), (269, 79035), (479, 44385), (807, 26345), (1345, 15807), (1437, 14795), (2395, 8877), (2959, 7185), (4035, 5269)]