21330868

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{1319}}^1$

素因数の和:1647

約数の個数: 24

約数和(自身を含む): 40360320

約数和(自身を除く): 19029452

約数列:

[1, 2, 4, 13, 26, 52, 311, 622, 1244, 1319, 2638, 4043, 5276, 8086, 16172, 17147, 34294, 68588, 410209, 820418, 1640836, 5332717, 10665434, 21330868]

約数ペア:

[(1, 21330868), (2, 10665434), (4, 5332717), (13, 1640836), (26, 820418), (52, 410209), (311, 68588), (622, 34294), (1244, 17147), (1319, 16172), (2638, 8086), (4043, 5276)]