21828177

素因数分解:

$3^3\times 7^3\times {\mathrm{2357}}^1$

素因数の和:2387

約数の個数: 32

約数和(自身を含む): 37728000

約数和(自身を除く): 15899823

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 343, 441, 1029, 1323, 2357, 3087, 7071, 9261, 16499, 21213, 49497, 63639, 115493, 148491, 346479, 445473, 808451, 1039437, 2425353, 3118311, 7276059, 21828177]

約数ペア:

[(1, 21828177), (3, 7276059), (7, 3118311), (9, 2425353), (21, 1039437), (27, 808451), (49, 445473), (63, 346479), (147, 148491), (189, 115493), (343, 63639), (441, 49497), (1029, 21213), (1323, 16499), (2357, 9261), (3087, 7071)]