257242020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{612481}}^1$

素因数の和:612500

約数の個数: 48

約数和(自身を含む): 823175808

約数和(自身を除く): 565933788

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 612481, 1224962, 1837443, 2449924, 3062405, 3674886, 4287367, 6124810, 7349772, 8574734, 9187215, 12249620, 12862101, 17149468, 18374430, 21436835, 25724202, 36748860, 42873670, 51448404, 64310505, 85747340, 128621010, 257242020]

約数ペア:

[(1, 257242020), (2, 128621010), (3, 85747340), (4, 64310505), (5, 51448404), (6, 42873670), (7, 36748860), (10, 25724202), (12, 21436835), (14, 18374430), (15, 17149468), (20, 12862101), (21, 12249620), (28, 9187215), (30, 8574734), (35, 7349772), (42, 6124810), (60, 4287367), (70, 3674886), (84, 3062405), (105, 2449924), (140, 1837443), (210, 1224962), (420, 612481)]