21249879

素因数分解:

$3^1\times 7^3\times {\mathrm{107}}^1\times {\mathrm{193}}^1$

素因数の和:324

約数の個数: 32

約数和(自身を含む): 33523200

約数和(自身を除く): 12273321

約数列:

[1, 3, 7, 21, 49, 107, 147, 193, 321, 343, 579, 749, 1029, 1351, 2247, 4053, 5243, 9457, 15729, 20651, 28371, 36701, 61953, 66199, 110103, 144557, 198597, 433671, 1011899, 3035697, 7083293, 21249879]

約数ペア:

[(1, 21249879), (3, 7083293), (7, 3035697), (21, 1011899), (49, 433671), (107, 198597), (147, 144557), (193, 110103), (321, 66199), (343, 61953), (579, 36701), (749, 28371), (1029, 20651), (1351, 15729), (2247, 9457), (4053, 5243)]