18221511

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{101}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 31256064

約数和(自身を除く): 13034553

約数列:

[1, 3, 7, 11, 21, 33, 71, 77, 101, 121, 213, 231, 303, 363, 497, 707, 781, 847, 1111, 1491, 2121, 2343, 2541, 3333, 5467, 7171, 7777, 8591, 12221, 16401, 21513, 23331, 25773, 36663, 50197, 60137, 78881, 85547, 150591, 180411, 236643, 256641, 552167, 867691, 1656501, 2603073, 6073837, 18221511]

約数ペア:

[(1, 18221511), (3, 6073837), (7, 2603073), (11, 1656501), (21, 867691), (33, 552167), (71, 256641), (77, 236643), (101, 180411), (121, 150591), (213, 85547), (231, 78881), (303, 60137), (363, 50197), (497, 36663), (707, 25773), (781, 23331), (847, 21513), (1111, 16401), (1491, 12221), (2121, 8591), (2343, 7777), (2541, 7171), (3333, 5467)]