21297157

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{3407}}^1$

素因数の和:3480

約数の個数: 16

約数和(自身を含む): 26173440

約数和(自身を除く): 4876283

約数列:

[1, 7, 19, 47, 133, 329, 893, 3407, 6251, 23849, 64733, 160129, 453131, 1120903, 3042451, 21297157]

約数ペア:

[(1, 21297157), (7, 3042451), (19, 1120903), (47, 453131), (133, 160129), (329, 64733), (893, 23849), (3407, 6251)]