21291799

素因数分解:

${\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{113}}^1\times {\mathrm{211}}^1$

素因数の和:390

約数の個数: 16

約数和(自身を含む): 23201280

約数和(自身を除く): 1909481

約数列:

[1, 19, 47, 113, 211, 893, 2147, 4009, 5311, 9917, 23843, 100909, 188423, 453017, 1120621, 21291799]

約数ペア:

[(1, 21291799), (19, 1120621), (47, 453017), (113, 188423), (211, 100909), (893, 23843), (2147, 9917), (4009, 5311)]