19965981

素因数分解:

$3^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{1913}}^1$

素因数の和:2001

約数の個数: 24

約数和(自身を含む): 31420224

約数和(自身を除く): 11454243

約数列:

[1, 3, 7, 21, 49, 71, 147, 213, 497, 1491, 1913, 3479, 5739, 10437, 13391, 40173, 93737, 135823, 281211, 407469, 950761, 2852283, 6655327, 19965981]

約数ペア:

[(1, 19965981), (3, 6655327), (7, 2852283), (21, 950761), (49, 407469), (71, 281211), (147, 135823), (213, 93737), (497, 40173), (1491, 13391), (1913, 10437), (3479, 5739)]