19902008

素因数分解:

$2^3\times 7^1\times {\mathrm{239}}^1\times {\mathrm{1487}}^1$

素因数の和:1739

約数の個数: 32

約数和(自身を含む): 42854400

約数和(自身を除く): 22952392

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 239, 478, 956, 1487, 1673, 1912, 2974, 3346, 5948, 6692, 10409, 11896, 13384, 20818, 41636, 83272, 355393, 710786, 1421572, 2487751, 2843144, 4975502, 9951004, 19902008]

約数ペア:

[(1, 19902008), (2, 9951004), (4, 4975502), (7, 2843144), (8, 2487751), (14, 1421572), (28, 710786), (56, 355393), (239, 83272), (478, 41636), (956, 20818), (1487, 13384), (1673, 11896), (1912, 10409), (2974, 6692), (3346, 5948)]