20631520

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{109}}^1$

素因数の和:157

約数の個数: 144

約数和(自身を含む): 60873120

約数和(自身を除く): 40241600

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 52, 56, 65, 70, 80, 91, 104, 109, 112, 130, 140, 160, 169, 182, 208, 218, 224, 260, 280, 338, 364, 416, 436, 455, 520, 545, 560, 676, 728, 763, 845, 872, 910, 1040, 1090, 1120, 1183, 1352, 1417, 1456, 1526, 1690, 1744, 1820, 2080, 2180, 2366, 2704, 2834, 2912, 3052, 3380, 3488, 3640, 3815, 4360, 4732, 5408, 5668, 5915, 6104, 6760, 7085, 7280, 7630, 8720, 9464, 9919, 11336, 11830, 12208, 13520, 14170, 14560, 15260, 17440, 18421, 18928, 19838, 22672, 23660, 24416, 27040, 28340, 30520, 36842, 37856, 39676, 45344, 47320, 49595, 56680, 61040, 73684, 79352, 92105, 94640, 99190, 113360, 122080, 128947, 147368, 158704, 184210, 189280, 198380, 226720, 257894, 294736, 317408, 368420, 396760, 515788, 589472, 644735, 736840, 793520, 1031576, 1289470, 1473680, 1587040, 2063152, 2578940, 2947360, 4126304, 5157880, 10315760, 20631520]

約数ペア:

[(1, 20631520), (2, 10315760), (4, 5157880), (5, 4126304), (7, 2947360), (8, 2578940), (10, 2063152), (13, 1587040), (14, 1473680), (16, 1289470), (20, 1031576), (26, 793520), (28, 736840), (32, 644735), (35, 589472), (40, 515788), (52, 396760), (56, 368420), (65, 317408), (70, 294736), (80, 257894), (91, 226720), (104, 198380), (109, 189280), (112, 184210), (130, 158704), (140, 147368), (160, 128947), (169, 122080), (182, 113360), (208, 99190), (218, 94640), (224, 92105), (260, 79352), (280, 73684), (338, 61040), (364, 56680), (416, 49595), (436, 47320), (455, 45344), (520, 39676), (545, 37856), (560, 36842), (676, 30520), (728, 28340), (763, 27040), (845, 24416), (872, 23660), (910, 22672), (1040, 19838), (1090, 18928), (1120, 18421), (1183, 17440), (1352, 15260), (1417, 14560), (1456, 14170), (1526, 13520), (1690, 12208), (1744, 11830), (1820, 11336), (2080, 9919), (2180, 9464), (2366, 8720), (2704, 7630), (2834, 7280), (2912, 7085), (3052, 6760), (3380, 6104), (3488, 5915), (3640, 5668), (3815, 5408), (4360, 4732)]