21651931

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{3433}}^1$

素因数の和:3510

約数の個数: 16

約数和(自身を含む): 26702784

約数和(自身を除く): 5050853

約数列:

[1, 7, 17, 53, 119, 371, 901, 3433, 6307, 24031, 58361, 181949, 408527, 1273643, 3093133, 21651931]

約数ペア:

[(1, 21651931), (7, 3093133), (17, 1273643), (53, 408527), (119, 181949), (371, 58361), (901, 24031), (3433, 6307)]