21127205

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{47}}^1\times {\mathrm{743}}^1$

素因数の和:817

約数の個数: 24

約数和(自身を含む): 28498176

約数和(自身を除く): 7370971

約数列:

[1, 5, 11, 47, 55, 121, 235, 517, 605, 743, 2585, 3715, 5687, 8173, 28435, 34921, 40865, 89903, 174605, 384131, 449515, 1920655, 4225441, 21127205]

約数ペア:

[(1, 21127205), (5, 4225441), (11, 1920655), (47, 449515), (55, 384131), (121, 174605), (235, 89903), (517, 40865), (605, 34921), (743, 28435), (2585, 8173), (3715, 5687)]