21749985

素因数分解:

$3^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{2207}}^1$

素因数の和:2294

約数の個数: 32

約数和(自身を含む): 39214080

約数和(自身を除く): 17464095

約数列:

[1, 3, 5, 9, 15, 27, 45, 73, 135, 219, 365, 657, 1095, 1971, 2207, 3285, 6621, 9855, 11035, 19863, 33105, 59589, 99315, 161111, 297945, 483333, 805555, 1449999, 2416665, 4349997, 7249995, 21749985]

約数ペア:

[(1, 21749985), (3, 7249995), (5, 4349997), (9, 2416665), (15, 1449999), (27, 805555), (45, 483333), (73, 297945), (135, 161111), (219, 99315), (365, 59589), (657, 33105), (1095, 19863), (1971, 11035), (2207, 9855), (3285, 6621)]