21090692

素因数分解:

$2^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{103}}^2$

素因数の和:288

約数の個数: 36

約数和(自身を含む): 43194816

約数和(自身を除く): 22104124

約数列:

[1, 2, 4, 7, 14, 28, 71, 103, 142, 206, 284, 412, 497, 721, 994, 1442, 1988, 2884, 7313, 10609, 14626, 21218, 29252, 42436, 51191, 74263, 102382, 148526, 204764, 297052, 753239, 1506478, 3012956, 5272673, 10545346, 21090692]

約数ペア:

[(1, 21090692), (2, 10545346), (4, 5272673), (7, 3012956), (14, 1506478), (28, 753239), (71, 297052), (103, 204764), (142, 148526), (206, 102382), (284, 74263), (412, 51191), (497, 42436), (721, 29252), (994, 21218), (1442, 14626), (1988, 10609), (2884, 7313)]