21027643

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{743}}^1$

素因数の和:1074

約数の個数: 16

約数和(自身を含む): 25998336

約数和(自身を除く): 4970693

約数列:

[1, 7, 13, 91, 311, 743, 2177, 4043, 5201, 9659, 28301, 67613, 231073, 1617511, 3003949, 21027643]

約数ペア:

[(1, 21027643), (7, 3003949), (13, 1617511), (91, 231073), (311, 67613), (743, 28301), (2177, 9659), (4043, 5201)]