21669920

素因数分解:

$2^5\times 5^1\times {\mathrm{167}}^1\times {\mathrm{811}}^1$

素因数の和:993

約数の個数: 48

約数和(自身を含む): 51565248

約数和(自身を除く): 29895328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 167, 334, 668, 811, 835, 1336, 1622, 1670, 2672, 3244, 3340, 4055, 5344, 6488, 6680, 8110, 12976, 13360, 16220, 25952, 26720, 32440, 64880, 129760, 135437, 270874, 541748, 677185, 1083496, 1354370, 2166992, 2708740, 4333984, 5417480, 10834960, 21669920]

約数ペア:

[(1, 21669920), (2, 10834960), (4, 5417480), (5, 4333984), (8, 2708740), (10, 2166992), (16, 1354370), (20, 1083496), (32, 677185), (40, 541748), (80, 270874), (160, 135437), (167, 129760), (334, 64880), (668, 32440), (811, 26720), (835, 25952), (1336, 16220), (1622, 13360), (1670, 12976), (2672, 8110), (3244, 6680), (3340, 6488), (4055, 5344)]