81977780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{173}}^1$

素因数の和:273

約数の個数: 96

約数和(自身を含む): 192931200

約数和(自身を除く): 110953420

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 38, 43, 58, 76, 86, 95, 116, 145, 172, 173, 190, 215, 290, 346, 380, 430, 551, 580, 692, 817, 860, 865, 1102, 1247, 1634, 1730, 2204, 2494, 2755, 3268, 3287, 3460, 4085, 4988, 5017, 5510, 6235, 6574, 7439, 8170, 10034, 11020, 12470, 13148, 14878, 16340, 16435, 20068, 23693, 24940, 25085, 29756, 32870, 37195, 47386, 50170, 65740, 74390, 94772, 95323, 100340, 118465, 141341, 148780, 190646, 215731, 236930, 282682, 381292, 431462, 473860, 476615, 565364, 706705, 862924, 953230, 1078655, 1413410, 1906460, 2157310, 2826820, 4098889, 4314620, 8197778, 16395556, 20494445, 40988890, 81977780]

約数ペア:

[(1, 81977780), (2, 40988890), (4, 20494445), (5, 16395556), (10, 8197778), (19, 4314620), (20, 4098889), (29, 2826820), (38, 2157310), (43, 1906460), (58, 1413410), (76, 1078655), (86, 953230), (95, 862924), (116, 706705), (145, 565364), (172, 476615), (173, 473860), (190, 431462), (215, 381292), (290, 282682), (346, 236930), (380, 215731), (430, 190646), (551, 148780), (580, 141341), (692, 118465), (817, 100340), (860, 95323), (865, 94772), (1102, 74390), (1247, 65740), (1634, 50170), (1730, 47386), (2204, 37195), (2494, 32870), (2755, 29756), (3268, 25085), (3287, 24940), (3460, 23693), (4085, 20068), (4988, 16435), (5017, 16340), (5510, 14878), (6235, 13148), (6574, 12470), (7439, 11020), (8170, 10034)]