81958723

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{151}}^1$

素因数の和:248

約数の個数: 48

約数和(自身を含む): 112285440

約数和(自身を除く): 30326717

約数列:

[1, 7, 11, 19, 49, 53, 77, 133, 151, 209, 371, 539, 583, 931, 1007, 1057, 1463, 1661, 2597, 2869, 4081, 7049, 7399, 8003, 10241, 11077, 11627, 20083, 28567, 31559, 49343, 56021, 77539, 81389, 88033, 140581, 152057, 220913, 392147, 542773, 616231, 1064399, 1546391, 1672627, 4313617, 7450793, 11708389, 81958723]

約数ペア:

[(1, 81958723), (7, 11708389), (11, 7450793), (19, 4313617), (49, 1672627), (53, 1546391), (77, 1064399), (133, 616231), (151, 542773), (209, 392147), (371, 220913), (539, 152057), (583, 140581), (931, 88033), (1007, 81389), (1057, 77539), (1463, 56021), (1661, 49343), (2597, 31559), (2869, 28567), (4081, 20083), (7049, 11627), (7399, 11077), (8003, 10241)]