21921921

素因数分解:

$3^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^2$

素因数の和:124

約数の個数: 60

約数和(自身を含む): 40028736

約数和(自身を除く): 18106815

約数列:

[1, 3, 7, 9, 21, 23, 27, 41, 63, 69, 81, 123, 161, 189, 207, 287, 369, 483, 567, 621, 861, 943, 1107, 1449, 1681, 1863, 2583, 2829, 3321, 4347, 5043, 6601, 7749, 8487, 11767, 13041, 15129, 19803, 23247, 25461, 35301, 38663, 45387, 59409, 76383, 105903, 115989, 136161, 178227, 270641, 317709, 347967, 534681, 811923, 953127, 1043901, 2435769, 3131703, 7307307, 21921921]

約数ペア:

[(1, 21921921), (3, 7307307), (7, 3131703), (9, 2435769), (21, 1043901), (23, 953127), (27, 811923), (41, 534681), (63, 347967), (69, 317709), (81, 270641), (123, 178227), (161, 136161), (189, 115989), (207, 105903), (287, 76383), (369, 59409), (483, 45387), (567, 38663), (621, 35301), (861, 25461), (943, 23247), (1107, 19803), (1449, 15129), (1681, 13041), (1863, 11767), (2583, 8487), (2829, 7749), (3321, 6601), (4347, 5043)]