291239721

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{7489}}^1$

素因数の和:7673

約数の個数: 24

約数和(自身を含む): 438165000

約数和(自身を除く): 146925279

約数列:

[1, 3, 9, 29, 87, 149, 261, 447, 1341, 4321, 7489, 12963, 22467, 38889, 67401, 217181, 651543, 1115861, 1954629, 3347583, 10042749, 32359969, 97079907, 291239721]

約数ペア:

[(1, 291239721), (3, 97079907), (9, 32359969), (29, 10042749), (87, 3347583), (149, 1954629), (261, 1115861), (447, 651543), (1341, 217181), (4321, 67401), (7489, 38889), (12963, 22467)]