81505865

素因数分解:

$5^1\times 7^2\times {\mathrm{277}}^1\times {\mathrm{1201}}^1$

素因数の和:1497

約数の個数: 24

約数和(自身を含む): 114281352

約数和(自身を除く): 32775487

約数列:

[1, 5, 7, 35, 49, 245, 277, 1201, 1385, 1939, 6005, 8407, 9695, 13573, 42035, 58849, 67865, 294245, 332677, 1663385, 2328739, 11643695, 16301173, 81505865]

約数ペア:

[(1, 81505865), (5, 16301173), (7, 11643695), (35, 2328739), (49, 1663385), (245, 332677), (277, 294245), (1201, 67865), (1385, 58849), (1939, 42035), (6005, 13573), (8407, 9695)]