20980320

素因数分解:

$2^5\times 3^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{401}}^1$

素因数の和:528

約数の個数: 96

約数和(自身を含む): 66860640

約数和(自身を除く): 45880320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 80, 96, 109, 120, 160, 218, 240, 327, 401, 436, 480, 545, 654, 802, 872, 1090, 1203, 1308, 1604, 1635, 1744, 2005, 2180, 2406, 2616, 3208, 3270, 3488, 4010, 4360, 4812, 5232, 6015, 6416, 6540, 8020, 8720, 9624, 10464, 12030, 12832, 13080, 16040, 17440, 19248, 24060, 26160, 32080, 38496, 43709, 48120, 52320, 64160, 87418, 96240, 131127, 174836, 192480, 218545, 262254, 349672, 437090, 524508, 655635, 699344, 874180, 1049016, 1311270, 1398688, 1748360, 2098032, 2622540, 3496720, 4196064, 5245080, 6993440, 10490160, 20980320]

約数ペア:

[(1, 20980320), (2, 10490160), (3, 6993440), (4, 5245080), (5, 4196064), (6, 3496720), (8, 2622540), (10, 2098032), (12, 1748360), (15, 1398688), (16, 1311270), (20, 1049016), (24, 874180), (30, 699344), (32, 655635), (40, 524508), (48, 437090), (60, 349672), (80, 262254), (96, 218545), (109, 192480), (120, 174836), (160, 131127), (218, 96240), (240, 87418), (327, 64160), (401, 52320), (436, 48120), (480, 43709), (545, 38496), (654, 32080), (802, 26160), (872, 24060), (1090, 19248), (1203, 17440), (1308, 16040), (1604, 13080), (1635, 12832), (1744, 12030), (2005, 10464), (2180, 9624), (2406, 8720), (2616, 8020), (3208, 6540), (3270, 6416), (3488, 6015), (4010, 5232), (4360, 4812)]