21165316

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{278491}}^1$

素因数の和:278514

約数の個数: 12

約数和(自身を含む): 38988880

約数和(自身を除く): 17823564

約数列:

[1, 2, 4, 19, 38, 76, 278491, 556982, 1113964, 5291329, 10582658, 21165316]

約数ペア:

[(1, 21165316), (2, 10582658), (4, 5291329), (19, 1113964), (38, 556982), (76, 278491)]