21105873

素因数分解:

$3^3\times {\mathrm{37}}^2\times {\mathrm{571}}^1$

素因数の和:654

約数の個数: 24

約数和(自身を含む): 32192160

約数和(自身を除く): 11086287

約数列:

[1, 3, 9, 27, 37, 111, 333, 571, 999, 1369, 1713, 4107, 5139, 12321, 15417, 21127, 36963, 63381, 190143, 570429, 781699, 2345097, 7035291, 21105873]

約数ペア:

[(1, 21105873), (3, 7035291), (9, 2345097), (27, 781699), (37, 570429), (111, 190143), (333, 63381), (571, 36963), (999, 21127), (1369, 15417), (1713, 12321), (4107, 5139)]