399091994

素因数分解:

$2^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{311}}^1\times {\mathrm{1291}}^1$

素因数の和:1682

約数の個数: 32

約数和(自身を含む): 696563712

約数和(自身を除く): 297471718

約数列:

[1, 2, 7, 14, 71, 142, 311, 497, 622, 994, 1291, 2177, 2582, 4354, 9037, 18074, 22081, 44162, 91661, 154567, 183322, 309134, 401501, 641627, 803002, 1283254, 2810507, 5621014, 28506571, 57013142, 199545997, 399091994]

約数ペア:

[(1, 399091994), (2, 199545997), (7, 57013142), (14, 28506571), (71, 5621014), (142, 2810507), (311, 1283254), (497, 803002), (622, 641627), (994, 401501), (1291, 309134), (2177, 183322), (2582, 154567), (4354, 91661), (9037, 44162), (18074, 22081)]