21176155

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{4231}}^1$

素因数の和:4267

約数の個数: 32

約数和(自身を含む): 34126848

約数和(自身を除く): 12950693

約数列:

[1, 5, 7, 11, 13, 35, 55, 65, 77, 91, 143, 385, 455, 715, 1001, 4231, 5005, 21155, 29617, 46541, 55003, 148085, 232705, 275015, 325787, 385021, 605033, 1628935, 1925105, 3025165, 4235231, 21176155]

約数ペア:

[(1, 21176155), (5, 4235231), (7, 3025165), (11, 1925105), (13, 1628935), (35, 605033), (55, 385021), (65, 325787), (77, 275015), (91, 232705), (143, 148085), (385, 55003), (455, 46541), (715, 29617), (1001, 21155), (4231, 5005)]