21279088

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{69997}}^1$

素因数の和:70024

約数の個数: 20

約数和(自身を含む): 43398760

約数和(自身を除く): 22119672

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 69997, 139994, 279988, 559976, 1119952, 1329943, 2659886, 5319772, 10639544, 21279088]

約数ペア:

[(1, 21279088), (2, 10639544), (4, 5319772), (8, 2659886), (16, 1329943), (19, 1119952), (38, 559976), (76, 279988), (152, 139994), (304, 69997)]