21255891

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{233}}^1\times {\mathrm{647}}^1$

素因数の和:930

約数の個数: 16

約数和(自身を含む): 29113344

約数和(自身を除く): 7857453

約数列:

[1, 3, 47, 141, 233, 647, 699, 1941, 10951, 30409, 32853, 91227, 150751, 452253, 7085297, 21255891]

約数ペア:

[(1, 21255891), (3, 7085297), (47, 452253), (141, 150751), (233, 91227), (647, 32853), (699, 30409), (1941, 10951)]