28120521

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{101}}^1$

素因数の和:198

約数の個数: 48

約数和(自身を含む): 45581760

約数和(自身を除く): 17461239

約数列:

[1, 3, 11, 13, 33, 39, 59, 101, 121, 143, 177, 303, 363, 429, 649, 767, 1111, 1313, 1573, 1947, 2301, 3333, 3939, 4719, 5959, 7139, 8437, 12221, 14443, 17877, 21417, 25311, 36663, 43329, 65549, 77467, 92807, 158873, 196647, 232401, 278421, 476619, 721039, 852137, 2163117, 2556411, 9373507, 28120521]

約数ペア:

[(1, 28120521), (3, 9373507), (11, 2556411), (13, 2163117), (33, 852137), (39, 721039), (59, 476619), (101, 278421), (121, 232401), (143, 196647), (177, 158873), (303, 92807), (363, 77467), (429, 65549), (649, 43329), (767, 36663), (1111, 25311), (1313, 21417), (1573, 17877), (1947, 14443), (2301, 12221), (3333, 8437), (3939, 7139), (4719, 5959)]