21737121

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{347}}^1$

素因数の和:533

約数の個数: 32

約数和(自身を含む): 35189760

約数和(自身を除く): 13452639

約数列:

[1, 3, 7, 19, 21, 57, 133, 157, 347, 399, 471, 1041, 1099, 2429, 2983, 3297, 6593, 7287, 8949, 19779, 20881, 46151, 54479, 62643, 138453, 163437, 381353, 1035101, 1144059, 3105303, 7245707, 21737121]

約数ペア:

[(1, 21737121), (3, 7245707), (7, 3105303), (19, 1144059), (21, 1035101), (57, 381353), (133, 163437), (157, 138453), (347, 62643), (399, 54479), (471, 46151), (1041, 20881), (1099, 19779), (2429, 8949), (2983, 7287), (3297, 6593)]