21747981

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{211}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 32237568

約数和(自身を除く): 10489587

約数列:

[1, 3, 17, 43, 47, 51, 129, 141, 211, 633, 731, 799, 2021, 2193, 2397, 3587, 6063, 9073, 9917, 10761, 27219, 29751, 34357, 103071, 154241, 168589, 426431, 462723, 505767, 1279293, 7249327, 21747981]

約数ペア:

[(1, 21747981), (3, 7249327), (17, 1279293), (43, 505767), (47, 462723), (51, 426431), (129, 168589), (141, 154241), (211, 103071), (633, 34357), (731, 29751), (799, 27219), (2021, 10761), (2193, 9917), (2397, 9073), (3587, 6063)]