21787281

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{1237}}^1$

素因数の和:1365

約数の個数: 24

約数和(自身を含む): 33475520

約数和(自身を除く): 11688239

約数列:

[1, 3, 9, 19, 57, 103, 171, 309, 927, 1237, 1957, 3711, 5871, 11133, 17613, 23503, 70509, 127411, 211527, 382233, 1146699, 2420809, 7262427, 21787281]

約数ペア:

[(1, 21787281), (3, 7262427), (9, 2420809), (19, 1146699), (57, 382233), (103, 211527), (171, 127411), (309, 70509), (927, 23503), (1237, 17613), (1957, 11133), (3711, 5871)]