21138670

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{311}}^1\times {\mathrm{971}}^1$

素因数の和:1296

約数の個数: 32

約数和(自身を含む): 43670016

約数和(自身を除く): 22531346

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 311, 622, 971, 1555, 1942, 2177, 3110, 4354, 4855, 6797, 9710, 10885, 13594, 21770, 33985, 67970, 301981, 603962, 1509905, 2113867, 3019810, 4227734, 10569335, 21138670]

約数ペア:

[(1, 21138670), (2, 10569335), (5, 4227734), (7, 3019810), (10, 2113867), (14, 1509905), (35, 603962), (70, 301981), (311, 67970), (622, 33985), (971, 21770), (1555, 13594), (1942, 10885), (2177, 9710), (3110, 6797), (4354, 4855)]