21185909872

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{69690493}}^1$

素因数の和:69690520

約数の個数: 20

約数和(自身を含む): 43208106280

約数和(自身を除く): 22022196408

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 69690493, 139380986, 278761972, 557523944, 1115047888, 1324119367, 2648238734, 5296477468, 10592954936, 21185909872]

約数ペア:

[(1, 21185909872), (2, 10592954936), (4, 5296477468), (8, 2648238734), (16, 1324119367), (19, 1115047888), (38, 557523944), (76, 278761972), (152, 139380986), (304, 69690493)]