20994363

素因数分解:

$3^3\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:185

約数の個数: 48

約数和(自身を含む): 34784640

約数和(自身を除く): 13790277

約数列:

[1, 3, 9, 13, 27, 39, 43, 107, 117, 129, 169, 321, 351, 387, 507, 559, 963, 1161, 1391, 1521, 1677, 2889, 4173, 4563, 4601, 5031, 7267, 12519, 13803, 15093, 18083, 21801, 37557, 41409, 54249, 59813, 65403, 124227, 162747, 179439, 196209, 488241, 538317, 777569, 1614951, 2332707, 6998121, 20994363]

約数ペア:

[(1, 20994363), (3, 6998121), (9, 2332707), (13, 1614951), (27, 777569), (39, 538317), (43, 488241), (107, 196209), (117, 179439), (129, 162747), (169, 124227), (321, 65403), (351, 59813), (387, 54249), (507, 41409), (559, 37557), (963, 21801), (1161, 18083), (1391, 15093), (1521, 13803), (1677, 12519), (2889, 7267), (4173, 5031), (4563, 4601)]