21313887

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{27431}}^1$

素因数の和:27478

約数の個数: 16

約数和(自身を含む): 33357312

約数和(自身を除く): 12043425

約数列:

[1, 3, 7, 21, 37, 111, 259, 777, 27431, 82293, 192017, 576051, 1014947, 3044841, 7104629, 21313887]

約数ペア:

[(1, 21313887), (3, 7104629), (7, 3044841), (21, 1014947), (37, 576051), (111, 192017), (259, 82293), (777, 27431)]