21279664

素因数分解:

$2^4\times 7^1\times {\mathrm{189997}}^1$

素因数の和:190012

約数の個数: 20

約数和(自身を含む): 47119504

約数和(自身を除く): 25839840

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 189997, 379994, 759988, 1329979, 1519976, 2659958, 3039952, 5319916, 10639832, 21279664]

約数ペア:

[(1, 21279664), (2, 10639832), (4, 5319916), (7, 3039952), (8, 2659958), (14, 1519976), (16, 1329979), (28, 759988), (56, 379994), (112, 189997)]