21089968

素因数分解:

$2^4\times {\mathrm{83}}^1\times {\mathrm{15881}}^1$

素因数の和:15972

約数の個数: 20

約数和(自身を含む): 41356728

約数和(自身を除く): 20266760

約数列:

[1, 2, 4, 8, 16, 83, 166, 332, 664, 1328, 15881, 31762, 63524, 127048, 254096, 1318123, 2636246, 5272492, 10544984, 21089968]

約数ペア:

[(1, 21089968), (2, 10544984), (4, 5272492), (8, 2636246), (16, 1318123), (83, 254096), (166, 127048), (332, 63524), (664, 31762), (1328, 15881)]