77881237

素因数分解:

$7^4\times {\mathrm{163}}^1\times {\mathrm{199}}^1$

素因数の和:390

約数の個数: 20

約数和(自身を含む): 91872800

約数和(自身を除く): 13991563

約数列:

[1, 7, 49, 163, 199, 343, 1141, 1393, 2401, 7987, 9751, 32437, 55909, 68257, 227059, 391363, 477799, 1589413, 11125891, 77881237]

約数ペア:

[(1, 77881237), (7, 11125891), (49, 1589413), (163, 477799), (199, 391363), (343, 227059), (1141, 68257), (1393, 55909), (2401, 32437), (7987, 9751)]