81404015

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{317}}^1$

素因数の和:392

約数の個数: 64

約数和(自身を含む): 131880960

約数和(自身を除く): 50476945

約数列:

[1, 5, 7, 11, 23, 29, 35, 55, 77, 115, 145, 161, 203, 253, 317, 319, 385, 667, 805, 1015, 1265, 1585, 1595, 1771, 2219, 2233, 3335, 3487, 4669, 7291, 7337, 8855, 9193, 11095, 11165, 17435, 23345, 24409, 36455, 36685, 45965, 51037, 51359, 64351, 80201, 101123, 122045, 211439, 255185, 256795, 321755, 401005, 505615, 561407, 707861, 1057195, 1480073, 2325829, 2807035, 3539305, 7400365, 11629145, 16280803, 81404015]

約数ペア:

[(1, 81404015), (5, 16280803), (7, 11629145), (11, 7400365), (23, 3539305), (29, 2807035), (35, 2325829), (55, 1480073), (77, 1057195), (115, 707861), (145, 561407), (161, 505615), (203, 401005), (253, 321755), (317, 256795), (319, 255185), (385, 211439), (667, 122045), (805, 101123), (1015, 80201), (1265, 64351), (1585, 51359), (1595, 51037), (1771, 45965), (2219, 36685), (2233, 36455), (3335, 24409), (3487, 23345), (4669, 17435), (7291, 11165), (7337, 11095), (8855, 9193)]