18661993

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{571}}^1$

素因数の和:637

約数の個数: 24

約数和(自身を含む): 23474880

約数和(自身を除く): 4812887

約数列:

[1, 7, 23, 29, 49, 161, 203, 571, 667, 1127, 1421, 3997, 4669, 13133, 16559, 27979, 32683, 91931, 115913, 380857, 643517, 811391, 2665999, 18661993]

約数ペア:

[(1, 18661993), (7, 2665999), (23, 811391), (29, 643517), (49, 380857), (161, 115913), (203, 91931), (571, 32683), (667, 27979), (1127, 16559), (1421, 13133), (3997, 4669)]