21006321

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{21283}}^1$

素因数の和:21340

約数の個数: 16

約数和(自身を含む): 32692224

約数和(自身を除く): 11685903

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 21283, 63849, 148981, 446943, 1000301, 3000903, 7002107, 21006321]

約数ペア:

[(1, 21006321), (3, 7002107), (7, 3000903), (21, 1000301), (47, 446943), (141, 148981), (329, 63849), (987, 21283)]