19806507

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{293}}^1$

素因数の和:372

約数の個数: 48

約数和(自身を含む): 34856640

約数和(自身を除く): 15050133

約数列:

[1, 3, 7, 9, 21, 29, 37, 63, 87, 111, 203, 259, 261, 293, 333, 609, 777, 879, 1073, 1827, 2051, 2331, 2637, 3219, 6153, 7511, 8497, 9657, 10841, 18459, 22533, 25491, 32523, 59479, 67599, 75887, 76473, 97569, 178437, 227661, 314389, 535311, 682983, 943167, 2200723, 2829501, 6602169, 19806507]

約数ペア:

[(1, 19806507), (3, 6602169), (7, 2829501), (9, 2200723), (21, 943167), (29, 682983), (37, 535311), (63, 314389), (87, 227661), (111, 178437), (203, 97569), (259, 76473), (261, 75887), (293, 67599), (333, 59479), (609, 32523), (777, 25491), (879, 22533), (1073, 18459), (1827, 10841), (2051, 9657), (2331, 8497), (2637, 7511), (3219, 6153)]