21158753

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{2521}}^1$

素因数の和:2648

約数の個数: 16

約数和(自身を含む): 26632320

約数和(自身を除く): 5473567

約数列:

[1, 7, 11, 77, 109, 763, 1199, 2521, 8393, 17647, 27731, 194117, 274789, 1923523, 3022679, 21158753]

約数ペア:

[(1, 21158753), (7, 3022679), (11, 1923523), (77, 274789), (109, 194117), (763, 27731), (1199, 17647), (2521, 8393)]