21007503

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{443}}^1\times {\mathrm{479}}^1$

素因数の和:939

約数の個数: 24

約数和(自身を含む): 33246720

約数和(自身を除く): 12239217

約数列:

[1, 3, 9, 11, 33, 99, 443, 479, 1329, 1437, 3987, 4311, 4873, 5269, 14619, 15807, 43857, 47421, 212197, 636591, 1909773, 2334167, 7002501, 21007503]

約数ペア:

[(1, 21007503), (3, 7002501), (9, 2334167), (11, 1909773), (33, 636591), (99, 212197), (443, 47421), (479, 43857), (1329, 15807), (1437, 14619), (3987, 5269), (4311, 4873)]