81840143

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{199}}^1$

素因数の和:340

約数の個数: 32

約数和(自身を含む): 105600000

約数和(自身を除く): 23759857

約数列:

[1, 7, 11, 49, 77, 109, 199, 343, 539, 763, 1199, 1393, 2189, 3773, 5341, 8393, 9751, 15323, 21691, 37387, 58751, 68257, 107261, 151837, 238601, 411257, 750827, 1062859, 1670207, 7440013, 11691449, 81840143]

約数ペア:

[(1, 81840143), (7, 11691449), (11, 7440013), (49, 1670207), (77, 1062859), (109, 750827), (199, 411257), (343, 238601), (539, 151837), (763, 107261), (1199, 68257), (1393, 58751), (2189, 37387), (3773, 21691), (5341, 15323), (8393, 9751)]