81431379

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{70139}}^1$

素因数の和:70191

約数の個数: 16

約数和(自身を含む): 123446400

約数和(自身を除く): 42015021

約数列:

[1, 3, 9, 27, 43, 129, 387, 1161, 70139, 210417, 631251, 1893753, 3015977, 9047931, 27143793, 81431379]

約数ペア:

[(1, 81431379), (3, 27143793), (9, 9047931), (27, 3015977), (43, 1893753), (129, 631251), (387, 210417), (1161, 70139)]