81371899

素因数分解:

$7^2\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{397}}^1$

素因数の和:547

約数の個数: 24

約数和(自身を含む): 98003520

約数和(自身を除く): 16631621

約数列:

[1, 7, 47, 49, 89, 329, 397, 623, 2303, 2779, 4183, 4361, 18659, 19453, 29281, 35333, 130613, 204967, 247331, 914291, 1660651, 1731317, 11624557, 81371899]

約数ペア:

[(1, 81371899), (7, 11624557), (47, 1731317), (49, 1660651), (89, 914291), (329, 247331), (397, 204967), (623, 130613), (2303, 35333), (2779, 29281), (4183, 19453), (4361, 18659)]