31380580

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:146

約数の個数: 144

約数和(自身を含む): 86873472

約数和(自身を除く): 55492892

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 41, 44, 49, 55, 70, 71, 77, 82, 98, 110, 140, 142, 154, 164, 196, 205, 220, 245, 284, 287, 308, 355, 385, 410, 451, 490, 497, 539, 574, 710, 770, 781, 820, 902, 980, 994, 1078, 1148, 1420, 1435, 1540, 1562, 1804, 1988, 2009, 2156, 2255, 2485, 2695, 2870, 2911, 3124, 3157, 3479, 3905, 4018, 4510, 4970, 5390, 5467, 5740, 5822, 6314, 6958, 7810, 8036, 9020, 9940, 10045, 10780, 10934, 11644, 12628, 13916, 14555, 15620, 15785, 17395, 20090, 20377, 21868, 22099, 27335, 29110, 31570, 32021, 34790, 38269, 40180, 40754, 44198, 54670, 58220, 63140, 64042, 69580, 76538, 81508, 88396, 101885, 109340, 110495, 128084, 142639, 153076, 160105, 191345, 203770, 220990, 224147, 285278, 320210, 382690, 407540, 441980, 448294, 570556, 640420, 713195, 765380, 896588, 1120735, 1426390, 1569029, 2241470, 2852780, 3138058, 4482940, 6276116, 7845145, 15690290, 31380580]

約数ペア:

[(1, 31380580), (2, 15690290), (4, 7845145), (5, 6276116), (7, 4482940), (10, 3138058), (11, 2852780), (14, 2241470), (20, 1569029), (22, 1426390), (28, 1120735), (35, 896588), (41, 765380), (44, 713195), (49, 640420), (55, 570556), (70, 448294), (71, 441980), (77, 407540), (82, 382690), (98, 320210), (110, 285278), (140, 224147), (142, 220990), (154, 203770), (164, 191345), (196, 160105), (205, 153076), (220, 142639), (245, 128084), (284, 110495), (287, 109340), (308, 101885), (355, 88396), (385, 81508), (410, 76538), (451, 69580), (490, 64042), (497, 63140), (539, 58220), (574, 54670), (710, 44198), (770, 40754), (781, 40180), (820, 38269), (902, 34790), (980, 32021), (994, 31570), (1078, 29110), (1148, 27335), (1420, 22099), (1435, 21868), (1540, 20377), (1562, 20090), (1804, 17395), (1988, 15785), (2009, 15620), (2156, 14555), (2255, 13916), (2485, 12628), (2695, 11644), (2870, 10934), (2911, 10780), (3124, 10045), (3157, 9940), (3479, 9020), (3905, 8036), (4018, 7810), (4510, 6958), (4970, 6314), (5390, 5822), (5467, 5740)]