21387723

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{44281}}^1$

素因数の和:44314

約数の個数: 16

約数和(自身を含む): 34008576

約数和(自身を除く): 12620853

約数列:

[1, 3, 7, 21, 23, 69, 161, 483, 44281, 132843, 309967, 929901, 1018463, 3055389, 7129241, 21387723]

約数ペア:

[(1, 21387723), (3, 7129241), (7, 3055389), (21, 1018463), (23, 929901), (69, 309967), (161, 132843), (483, 44281)]