21189259

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{13697}}^1$

素因数の和:13734

約数の個数: 16

約数和(自身を含む): 27615168

約数和(自身を除く): 6425909

約数列:

[1, 7, 13, 17, 91, 119, 221, 1547, 13697, 95879, 178061, 232849, 1246427, 1629943, 3027037, 21189259]

約数ペア:

[(1, 21189259), (7, 3027037), (13, 1629943), (17, 1246427), (91, 232849), (119, 178061), (221, 95879), (1547, 13697)]