21986505

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:207

約数の個数: 64

約数和(自身を含む): 41771520

約数和(自身を除く): 19785015

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 73, 97, 115, 135, 207, 219, 291, 345, 365, 485, 621, 657, 873, 1035, 1095, 1455, 1679, 1971, 2231, 2619, 3105, 3285, 4365, 5037, 6693, 7081, 8395, 9855, 11155, 13095, 15111, 20079, 21243, 25185, 33465, 35405, 45333, 60237, 63729, 75555, 100395, 106215, 162863, 191187, 226665, 301185, 318645, 488589, 814315, 955935, 1465767, 2442945, 4397301, 7328835, 21986505]

約数ペア:

[(1, 21986505), (3, 7328835), (5, 4397301), (9, 2442945), (15, 1465767), (23, 955935), (27, 814315), (45, 488589), (69, 318645), (73, 301185), (97, 226665), (115, 191187), (135, 162863), (207, 106215), (219, 100395), (291, 75555), (345, 63729), (365, 60237), (485, 45333), (621, 35405), (657, 33465), (873, 25185), (1035, 21243), (1095, 20079), (1455, 15111), (1679, 13095), (1971, 11155), (2231, 9855), (2619, 8395), (3105, 7081), (3285, 6693), (4365, 5037)]