21147208

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{1201}}^1$

素因数の和:1309

約数の個数: 32

約数和(自身を含む): 41541120

約数和(自身を除く): 20393912

約数列:

[1, 2, 4, 8, 31, 62, 71, 124, 142, 248, 284, 568, 1201, 2201, 2402, 4402, 4804, 8804, 9608, 17608, 37231, 74462, 85271, 148924, 170542, 297848, 341084, 682168, 2643401, 5286802, 10573604, 21147208]

約数ペア:

[(1, 21147208), (2, 10573604), (4, 5286802), (8, 2643401), (31, 682168), (62, 341084), (71, 297848), (124, 170542), (142, 148924), (248, 85271), (284, 74462), (568, 37231), (1201, 17608), (2201, 9608), (2402, 8804), (4402, 4804)]