21107840

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1$

素因数の和:134

約数の個数: 128

約数和(自身を含む): 56548800

約数和(自身を除く): 35440960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 43, 52, 59, 64, 65, 80, 86, 104, 118, 128, 130, 160, 172, 208, 215, 236, 260, 295, 320, 344, 416, 430, 472, 520, 559, 590, 640, 688, 767, 832, 860, 944, 1040, 1118, 1180, 1376, 1534, 1664, 1720, 1888, 2080, 2236, 2360, 2537, 2752, 2795, 3068, 3440, 3776, 3835, 4160, 4472, 4720, 5074, 5504, 5590, 6136, 6880, 7552, 7670, 8320, 8944, 9440, 10148, 11180, 12272, 12685, 13760, 15340, 17888, 18880, 20296, 22360, 24544, 25370, 27520, 30680, 32981, 35776, 37760, 40592, 44720, 49088, 50740, 61360, 65962, 71552, 81184, 89440, 98176, 101480, 122720, 131924, 162368, 164905, 178880, 202960, 245440, 263848, 324736, 329810, 357760, 405920, 490880, 527696, 659620, 811840, 1055392, 1319240, 1623680, 2110784, 2638480, 4221568, 5276960, 10553920, 21107840]

約数ペア:

[(1, 21107840), (2, 10553920), (4, 5276960), (5, 4221568), (8, 2638480), (10, 2110784), (13, 1623680), (16, 1319240), (20, 1055392), (26, 811840), (32, 659620), (40, 527696), (43, 490880), (52, 405920), (59, 357760), (64, 329810), (65, 324736), (80, 263848), (86, 245440), (104, 202960), (118, 178880), (128, 164905), (130, 162368), (160, 131924), (172, 122720), (208, 101480), (215, 98176), (236, 89440), (260, 81184), (295, 71552), (320, 65962), (344, 61360), (416, 50740), (430, 49088), (472, 44720), (520, 40592), (559, 37760), (590, 35776), (640, 32981), (688, 30680), (767, 27520), (832, 25370), (860, 24544), (944, 22360), (1040, 20296), (1118, 18880), (1180, 17888), (1376, 15340), (1534, 13760), (1664, 12685), (1720, 12272), (1888, 11180), (2080, 10148), (2236, 9440), (2360, 8944), (2537, 8320), (2752, 7670), (2795, 7552), (3068, 6880), (3440, 6136), (3776, 5590), (3835, 5504), (4160, 5074), (4472, 4720)]