21329140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{2087}}^1$

素因数の和:2176

約数の個数: 48

約数和(自身を含む): 51916032

約数和(自身を除く): 30586892

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 73, 140, 146, 292, 365, 511, 730, 1022, 1460, 2044, 2087, 2555, 4174, 5110, 8348, 10220, 10435, 14609, 20870, 29218, 41740, 58436, 73045, 146090, 152351, 292180, 304702, 609404, 761755, 1066457, 1523510, 2132914, 3047020, 4265828, 5332285, 10664570, 21329140]

約数ペア:

[(1, 21329140), (2, 10664570), (4, 5332285), (5, 4265828), (7, 3047020), (10, 2132914), (14, 1523510), (20, 1066457), (28, 761755), (35, 609404), (70, 304702), (73, 292180), (140, 152351), (146, 146090), (292, 73045), (365, 58436), (511, 41740), (730, 29218), (1022, 20870), (1460, 14609), (2044, 10435), (2087, 10220), (2555, 8348), (4174, 5110)]