21155260

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21587}}^1$

素因数の和:21610

約数の個数: 36

約数和(自身を含む): 51681672

約数和(自身を除く): 30526412

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21587, 43174, 86348, 107935, 151109, 215870, 302218, 431740, 604436, 755545, 1057763, 1511090, 2115526, 3022180, 4231052, 5288815, 10577630, 21155260]

約数ペア:

[(1, 21155260), (2, 10577630), (4, 5288815), (5, 4231052), (7, 3022180), (10, 2115526), (14, 1511090), (20, 1057763), (28, 755545), (35, 604436), (49, 431740), (70, 302218), (98, 215870), (140, 151109), (196, 107935), (245, 86348), (490, 43174), (980, 21587)]