21784240

素因数分解:

$2^4\times 5^1\times {\mathrm{317}}^1\times {\mathrm{859}}^1$

素因数の和:1189

約数の個数: 40

約数和(自身を含む): 50867280

約数和(自身を除く): 29083040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 317, 634, 859, 1268, 1585, 1718, 2536, 3170, 3436, 4295, 5072, 6340, 6872, 8590, 12680, 13744, 17180, 25360, 34360, 68720, 272303, 544606, 1089212, 1361515, 2178424, 2723030, 4356848, 5446060, 10892120, 21784240]

約数ペア:

[(1, 21784240), (2, 10892120), (4, 5446060), (5, 4356848), (8, 2723030), (10, 2178424), (16, 1361515), (20, 1089212), (40, 544606), (80, 272303), (317, 68720), (634, 34360), (859, 25360), (1268, 17180), (1585, 13744), (1718, 12680), (2536, 8590), (3170, 6872), (3436, 6340), (4295, 5072)]