21595457

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:225

約数の個数: 32

約数和(自身を含む): 26812800

約数和(自身を除く): 5217343

約数列:

[1, 13, 17, 19, 37, 139, 221, 247, 323, 481, 629, 703, 1807, 2363, 2641, 4199, 5143, 8177, 9139, 11951, 30719, 34333, 44897, 66859, 87431, 97717, 155363, 583661, 1136603, 1270321, 1661189, 21595457]

約数ペア:

[(1, 21595457), (13, 1661189), (17, 1270321), (19, 1136603), (37, 583661), (139, 155363), (221, 97717), (247, 87431), (323, 66859), (481, 44897), (629, 34333), (703, 30719), (1807, 11951), (2363, 9139), (2641, 8177), (4199, 5143)]