17978805

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{421}}^1$

素因数の和:518

約数の個数: 48

約数和(自身を含む): 34100976

約数和(自身を除く): 16122171

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 73, 117, 195, 219, 365, 421, 585, 657, 949, 1095, 1263, 2105, 2847, 3285, 3789, 4745, 5473, 6315, 8541, 14235, 16419, 18945, 27365, 30733, 42705, 49257, 82095, 92199, 153665, 246285, 276597, 399529, 460995, 1198587, 1382985, 1997645, 3595761, 5992935, 17978805]

約数ペア:

[(1, 17978805), (3, 5992935), (5, 3595761), (9, 1997645), (13, 1382985), (15, 1198587), (39, 460995), (45, 399529), (65, 276597), (73, 246285), (117, 153665), (195, 92199), (219, 82095), (365, 49257), (421, 42705), (585, 30733), (657, 27365), (949, 18945), (1095, 16419), (1263, 14235), (2105, 8541), (2847, 6315), (3285, 5473), (3789, 4745)]