21620313

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{157}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 37267776

約数和(自身を除く): 15647463

約数列:

[1, 3, 9, 11, 13, 33, 39, 99, 107, 117, 143, 157, 321, 429, 471, 963, 1177, 1287, 1391, 1413, 1727, 2041, 3531, 4173, 5181, 6123, 10593, 12519, 15301, 15543, 16799, 18369, 22451, 45903, 50397, 67353, 137709, 151191, 184789, 202059, 218387, 554367, 655161, 1663101, 1965483, 2402257, 7206771, 21620313]

約数ペア:

[(1, 21620313), (3, 7206771), (9, 2402257), (11, 1965483), (13, 1663101), (33, 655161), (39, 554367), (99, 218387), (107, 202059), (117, 184789), (143, 151191), (157, 137709), (321, 67353), (429, 50397), (471, 45903), (963, 22451), (1177, 18369), (1287, 16799), (1391, 15543), (1413, 15301), (1727, 12519), (2041, 10593), (3531, 6123), (4173, 5181)]