21087987

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1\times {\mathrm{2333}}^1$

素因数の和:2490

約数の個数: 16

約数和(自身を含む): 29576448

約数和(自身を除く): 8488461

約数列:

[1, 3, 23, 69, 131, 393, 2333, 3013, 6999, 9039, 53659, 160977, 305623, 916869, 7029329, 21087987]

約数ペア:

[(1, 21087987), (3, 7029329), (23, 916869), (69, 305623), (131, 160977), (393, 53659), (2333, 9039), (3013, 6999)]