2157155

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{431}}^1$

素因数の和:467

約数の個数: 32

約数和(自身を含む): 3483648

約数和(自身を除く): 1326493

約数列:

[1, 5, 7, 11, 13, 35, 55, 65, 77, 91, 143, 385, 431, 455, 715, 1001, 2155, 3017, 4741, 5005, 5603, 15085, 23705, 28015, 33187, 39221, 61633, 165935, 196105, 308165, 431431, 2157155]

約数ペア:

[(1, 2157155), (5, 431431), (7, 308165), (11, 196105), (13, 165935), (35, 61633), (55, 39221), (65, 33187), (77, 28015), (91, 23705), (143, 15085), (385, 5603), (431, 5005), (455, 4741), (715, 3017), (1001, 2155)]