21508335

素因数分解:

$3^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{2309}}^1$

素因数の和:2349

約数の個数: 40

約数和(自身を含む): 40249440

約数和(自身を除く): 18741105

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 115, 135, 207, 345, 405, 621, 1035, 1863, 2309, 3105, 6927, 9315, 11545, 20781, 34635, 53107, 62343, 103905, 159321, 187029, 265535, 311715, 477963, 796605, 935145, 1433889, 2389815, 4301667, 7169445, 21508335]

約数ペア:

[(1, 21508335), (3, 7169445), (5, 4301667), (9, 2389815), (15, 1433889), (23, 935145), (27, 796605), (45, 477963), (69, 311715), (81, 265535), (115, 187029), (135, 159321), (207, 103905), (345, 62343), (405, 53107), (621, 34635), (1035, 20781), (1863, 11545), (2309, 9315), (3105, 6927)]