18987409

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{839}}^1$

素因数の和:960

約数の個数: 16

約数和(自身を含む): 22498560

約数和(自身を除く): 3511151

約数列:

[1, 7, 53, 61, 371, 427, 839, 3233, 5873, 22631, 44467, 51179, 311269, 358253, 2712487, 18987409]

約数ペア:

[(1, 18987409), (7, 2712487), (53, 358253), (61, 311269), (371, 51179), (427, 44467), (839, 22631), (3233, 5873)]