21219891

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^2\times {\mathrm{1193}}^1$

素因数の和:1232

約数の個数: 36

約数和(自身を含む): 36206856

約数和(自身を除く): 14986965

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 121, 147, 231, 363, 539, 847, 1193, 1617, 2541, 3579, 5929, 8351, 13123, 17787, 25053, 39369, 58457, 91861, 144353, 175371, 275583, 433059, 643027, 1010471, 1929081, 3031413, 7073297, 21219891]

約数ペア:

[(1, 21219891), (3, 7073297), (7, 3031413), (11, 1929081), (21, 1010471), (33, 643027), (49, 433059), (77, 275583), (121, 175371), (147, 144353), (231, 91861), (363, 58457), (539, 39369), (847, 25053), (1193, 17787), (1617, 13123), (2541, 8351), (3579, 5929)]