20913840

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{937}}^1$

素因数の和:987

約数の個数: 120

約数和(自身を含む): 72578688

約数和(自身を除く): 51664848

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 31, 36, 40, 45, 48, 60, 62, 72, 80, 90, 93, 120, 124, 144, 155, 180, 186, 240, 248, 279, 310, 360, 372, 465, 496, 558, 620, 720, 744, 930, 937, 1116, 1240, 1395, 1488, 1860, 1874, 2232, 2480, 2790, 2811, 3720, 3748, 4464, 4685, 5580, 5622, 7440, 7496, 8433, 9370, 11160, 11244, 14055, 14992, 16866, 18740, 22320, 22488, 28110, 29047, 33732, 37480, 42165, 44976, 56220, 58094, 67464, 74960, 84330, 87141, 112440, 116188, 134928, 145235, 168660, 174282, 224880, 232376, 261423, 290470, 337320, 348564, 435705, 464752, 522846, 580940, 674640, 697128, 871410, 1045692, 1161880, 1307115, 1394256, 1742820, 2091384, 2323760, 2614230, 3485640, 4182768, 5228460, 6971280, 10456920, 20913840]

約数ペア:

[(1, 20913840), (2, 10456920), (3, 6971280), (4, 5228460), (5, 4182768), (6, 3485640), (8, 2614230), (9, 2323760), (10, 2091384), (12, 1742820), (15, 1394256), (16, 1307115), (18, 1161880), (20, 1045692), (24, 871410), (30, 697128), (31, 674640), (36, 580940), (40, 522846), (45, 464752), (48, 435705), (60, 348564), (62, 337320), (72, 290470), (80, 261423), (90, 232376), (93, 224880), (120, 174282), (124, 168660), (144, 145235), (155, 134928), (180, 116188), (186, 112440), (240, 87141), (248, 84330), (279, 74960), (310, 67464), (360, 58094), (372, 56220), (465, 44976), (496, 42165), (558, 37480), (620, 33732), (720, 29047), (744, 28110), (930, 22488), (937, 22320), (1116, 18740), (1240, 16866), (1395, 14992), (1488, 14055), (1860, 11244), (1874, 11160), (2232, 9370), (2480, 8433), (2790, 7496), (2811, 7440), (3720, 5622), (3748, 5580), (4464, 4685)]