21817593

素因数分解:

$3^4\times 7^2\times {\mathrm{23}}^1\times {\mathrm{239}}^1$

素因数の和:288

約数の個数: 60

約数和(自身を含む): 39726720

約数和(自身を除く): 17909127

約数列:

[1, 3, 7, 9, 21, 23, 27, 49, 63, 69, 81, 147, 161, 189, 207, 239, 441, 483, 567, 621, 717, 1127, 1323, 1449, 1673, 1863, 2151, 3381, 3969, 4347, 5019, 5497, 6453, 10143, 11711, 13041, 15057, 16491, 19359, 30429, 35133, 38479, 45171, 49473, 91287, 105399, 115437, 135513, 148419, 269353, 316197, 346311, 445257, 808059, 948591, 1038933, 2424177, 3116799, 7272531, 21817593]

約数ペア:

[(1, 21817593), (3, 7272531), (7, 3116799), (9, 2424177), (21, 1038933), (23, 948591), (27, 808059), (49, 445257), (63, 346311), (69, 316197), (81, 269353), (147, 148419), (161, 135513), (189, 115437), (207, 105399), (239, 91287), (441, 49473), (483, 45171), (567, 38479), (621, 35133), (717, 30429), (1127, 19359), (1323, 16491), (1449, 15057), (1673, 13041), (1863, 11711), (2151, 10143), (3381, 6453), (3969, 5497), (4347, 5019)]