20744480

素因数分解:

$2^5\times 5^1\times {\mathrm{317}}^1\times {\mathrm{409}}^1$

素因数の和:741

約数の個数: 48

約数和(自身を含む): 49283640

約数和(自身を除く): 28539160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 317, 409, 634, 818, 1268, 1585, 1636, 2045, 2536, 3170, 3272, 4090, 5072, 6340, 6544, 8180, 10144, 12680, 13088, 16360, 25360, 32720, 50720, 65440, 129653, 259306, 518612, 648265, 1037224, 1296530, 2074448, 2593060, 4148896, 5186120, 10372240, 20744480]

約数ペア:

[(1, 20744480), (2, 10372240), (4, 5186120), (5, 4148896), (8, 2593060), (10, 2074448), (16, 1296530), (20, 1037224), (32, 648265), (40, 518612), (80, 259306), (160, 129653), (317, 65440), (409, 50720), (634, 32720), (818, 25360), (1268, 16360), (1585, 13088), (1636, 12680), (2045, 10144), (2536, 8180), (3170, 6544), (3272, 6340), (4090, 5072)]