21056847

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{18919}}^1$

素因数の和:18982

約数の個数: 16

約数和(自身を含む): 32693760

約数和(自身を除く): 11636913

約数列:

[1, 3, 7, 21, 53, 159, 371, 1113, 18919, 56757, 132433, 397299, 1002707, 3008121, 7018949, 21056847]

約数ペア:

[(1, 21056847), (3, 7018949), (7, 3008121), (21, 1002707), (53, 397299), (159, 132433), (371, 56757), (1113, 18919)]