20765520

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{151}}^1\times {\mathrm{191}}^1$

素因数の和:361

約数の個数: 120

約数和(自身を含む): 70566912

約数和(自身を除く): 49801392

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 151, 180, 191, 240, 302, 360, 382, 453, 573, 604, 720, 755, 764, 906, 955, 1146, 1208, 1359, 1510, 1528, 1719, 1812, 1910, 2265, 2292, 2416, 2718, 2865, 3020, 3056, 3438, 3624, 3820, 4530, 4584, 5436, 5730, 6040, 6795, 6876, 7248, 7640, 8595, 9060, 9168, 10872, 11460, 12080, 13590, 13752, 15280, 17190, 18120, 21744, 22920, 27180, 27504, 28841, 34380, 36240, 45840, 54360, 57682, 68760, 86523, 108720, 115364, 137520, 144205, 173046, 230728, 259569, 288410, 346092, 432615, 461456, 519138, 576820, 692184, 865230, 1038276, 1153640, 1297845, 1384368, 1730460, 2076552, 2307280, 2595690, 3460920, 4153104, 5191380, 6921840, 10382760, 20765520]

約数ペア:

[(1, 20765520), (2, 10382760), (3, 6921840), (4, 5191380), (5, 4153104), (6, 3460920), (8, 2595690), (9, 2307280), (10, 2076552), (12, 1730460), (15, 1384368), (16, 1297845), (18, 1153640), (20, 1038276), (24, 865230), (30, 692184), (36, 576820), (40, 519138), (45, 461456), (48, 432615), (60, 346092), (72, 288410), (80, 259569), (90, 230728), (120, 173046), (144, 144205), (151, 137520), (180, 115364), (191, 108720), (240, 86523), (302, 68760), (360, 57682), (382, 54360), (453, 45840), (573, 36240), (604, 34380), (720, 28841), (755, 27504), (764, 27180), (906, 22920), (955, 21744), (1146, 18120), (1208, 17190), (1359, 15280), (1510, 13752), (1528, 13590), (1719, 12080), (1812, 11460), (1910, 10872), (2265, 9168), (2292, 9060), (2416, 8595), (2718, 7640), (2865, 7248), (3020, 6876), (3056, 6795), (3438, 6040), (3624, 5730), (3820, 5436), (4530, 4584)]