19711505

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{1051}}^1$

素因数の和:1109

約数の個数: 24

約数和(自身を含む): 26863872

約数和(自身を除く): 7152367

約数列:

[1, 5, 11, 31, 55, 121, 155, 341, 605, 1051, 1705, 3751, 5255, 11561, 18755, 32581, 57805, 127171, 162905, 358391, 635855, 1791955, 3942301, 19711505]

約数ペア:

[(1, 19711505), (5, 3942301), (11, 1791955), (31, 635855), (55, 358391), (121, 162905), (155, 127171), (341, 57805), (605, 32581), (1051, 18755), (1705, 11561), (3751, 5255)]