19717978

素因数分解:

$2^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1\times {\mathrm{239}}^1$

素因数の和:402

約数の個数: 32

約数和(自身を含む): 34836480

約数和(自身を除く): 15118502

約数列:

[1, 2, 7, 14, 71, 83, 142, 166, 239, 478, 497, 581, 994, 1162, 1673, 3346, 5893, 11786, 16969, 19837, 33938, 39674, 41251, 82502, 118783, 138859, 237566, 277718, 1408427, 2816854, 9858989, 19717978]

約数ペア:

[(1, 19717978), (2, 9858989), (7, 2816854), (14, 1408427), (71, 277718), (83, 237566), (142, 138859), (166, 118783), (239, 82502), (478, 41251), (497, 39674), (581, 33938), (994, 19837), (1162, 16969), (1673, 11786), (3346, 5893)]