21407155

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{55603}}^1$

素因数の和:55626

約数の個数: 16

約数和(自身を含む): 32027904

約数和(自身を除く): 10620749

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 55603, 278015, 389221, 611633, 1946105, 3058165, 4281431, 21407155]

約数ペア:

[(1, 21407155), (5, 4281431), (7, 3058165), (11, 1946105), (35, 611633), (55, 389221), (77, 278015), (385, 55603)]