21264740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{787}}^1$

素因数の和:996

約数の個数: 48

約数和(自身を含む): 51364992

約数和(自身を除く): 30100252

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 193, 386, 772, 787, 965, 1351, 1574, 1930, 2702, 3148, 3860, 3935, 5404, 5509, 6755, 7870, 11018, 13510, 15740, 22036, 27020, 27545, 55090, 110180, 151891, 303782, 607564, 759455, 1063237, 1518910, 2126474, 3037820, 4252948, 5316185, 10632370, 21264740]

約数ペア:

[(1, 21264740), (2, 10632370), (4, 5316185), (5, 4252948), (7, 3037820), (10, 2126474), (14, 1518910), (20, 1063237), (28, 759455), (35, 607564), (70, 303782), (140, 151891), (193, 110180), (386, 55090), (772, 27545), (787, 27020), (965, 22036), (1351, 15740), (1574, 13510), (1930, 11018), (2702, 7870), (3148, 6755), (3860, 5509), (3935, 5404)]