21289160

素因数分解:

$2^3\times 5^1\times {\mathrm{167}}^1\times {\mathrm{3187}}^1$

素因数の和:3365

約数の個数: 32

約数和(自身を含む): 48202560

約数和(自身を除く): 26913400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 167, 334, 668, 835, 1336, 1670, 3187, 3340, 6374, 6680, 12748, 15935, 25496, 31870, 63740, 127480, 532229, 1064458, 2128916, 2661145, 4257832, 5322290, 10644580, 21289160]

約数ペア:

[(1, 21289160), (2, 10644580), (4, 5322290), (5, 4257832), (8, 2661145), (10, 2128916), (20, 1064458), (40, 532229), (167, 127480), (334, 63740), (668, 31870), (835, 25496), (1336, 15935), (1670, 12748), (3187, 6680), (3340, 6374)]