20939151

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:231

約数の個数: 32

約数和(自身を含む): 30336768

約数和(自身を除く): 9397617

約数列:

[1, 3, 37, 41, 43, 107, 111, 123, 129, 321, 1517, 1591, 1763, 3959, 4387, 4551, 4601, 4773, 5289, 11877, 13161, 13803, 65231, 162319, 170237, 188641, 195693, 486957, 510711, 565923, 6979717, 20939151]

約数ペア:

[(1, 20939151), (3, 6979717), (37, 565923), (41, 510711), (43, 486957), (107, 195693), (111, 188641), (123, 170237), (129, 162319), (321, 65231), (1517, 13803), (1591, 13161), (1763, 11877), (3959, 5289), (4387, 4773), (4551, 4601)]