21478419

素因数分解:

$3^3\times {\mathrm{59}}^1\times {\mathrm{97}}^1\times {\mathrm{139}}^1$

素因数の和:304

約数の個数: 32

約数和(自身を含む): 32928000

約数和(自身を除く): 11449581

約数列:

[1, 3, 9, 27, 59, 97, 139, 177, 291, 417, 531, 873, 1251, 1593, 2619, 3753, 5723, 8201, 13483, 17169, 24603, 40449, 51507, 73809, 121347, 154521, 221427, 364041, 795497, 2386491, 7159473, 21478419]

約数ペア:

[(1, 21478419), (3, 7159473), (9, 2386491), (27, 795497), (59, 364041), (97, 221427), (139, 154521), (177, 121347), (291, 73809), (417, 51507), (531, 40449), (873, 24603), (1251, 17169), (1593, 13483), (2619, 8201), (3753, 5723)]