12840387

素因数分解:

$3^1\times 7^1\times {\mathrm{617}}^1\times {\mathrm{991}}^1$

素因数の和:1618

約数の個数: 16

約数和(自身を含む): 19617792

約数和(自身を除く): 6777405

約数列:

[1, 3, 7, 21, 617, 991, 1851, 2973, 4319, 6937, 12957, 20811, 611447, 1834341, 4280129, 12840387]

約数ペア:

[(1, 12840387), (3, 4280129), (7, 1834341), (21, 611447), (617, 20811), (991, 12957), (1851, 6937), (2973, 4319)]