81311237

素因数分解:

$7^3\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:250

約数の個数: 32

約数和(自身を含む): 100320000

約数和(自身を除く): 19008763

約数列:

[1, 7, 37, 43, 49, 149, 259, 301, 343, 1043, 1591, 1813, 2107, 5513, 6407, 7301, 11137, 12691, 14749, 38591, 44849, 51107, 77959, 237059, 270137, 313943, 545713, 1659413, 1890959, 2197601, 11615891, 81311237]

約数ペア:

[(1, 81311237), (7, 11615891), (37, 2197601), (43, 1890959), (49, 1659413), (149, 545713), (259, 313943), (301, 270137), (343, 237059), (1043, 77959), (1591, 51107), (1813, 44849), (2107, 38591), (5513, 14749), (6407, 12691), (7301, 11137)]