21043477

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{3257}}^1$

素因数の和:3348

約数の個数: 16

約数和(自身を含む): 26272512

約数和(自身を除く): 5229035

約数列:

[1, 7, 13, 71, 91, 497, 923, 3257, 6461, 22799, 42341, 231247, 296387, 1618729, 3006211, 21043477]

約数ペア:

[(1, 21043477), (7, 3006211), (13, 1618729), (71, 296387), (91, 231247), (497, 42341), (923, 22799), (3257, 6461)]