20896640

素因数分解:

$2^7\times 5^1\times {\mathrm{103}}^1\times {\mathrm{317}}^1$

素因数の和:439

約数の個数: 64

約数和(自身を含む): 50600160

約数和(自身を除く): 29703520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 103, 128, 160, 206, 317, 320, 412, 515, 634, 640, 824, 1030, 1268, 1585, 1648, 2060, 2536, 3170, 3296, 4120, 5072, 6340, 6592, 8240, 10144, 12680, 13184, 16480, 20288, 25360, 32651, 32960, 40576, 50720, 65302, 65920, 101440, 130604, 163255, 202880, 261208, 326510, 522416, 653020, 1044832, 1306040, 2089664, 2612080, 4179328, 5224160, 10448320, 20896640]

約数ペア:

[(1, 20896640), (2, 10448320), (4, 5224160), (5, 4179328), (8, 2612080), (10, 2089664), (16, 1306040), (20, 1044832), (32, 653020), (40, 522416), (64, 326510), (80, 261208), (103, 202880), (128, 163255), (160, 130604), (206, 101440), (317, 65920), (320, 65302), (412, 50720), (515, 40576), (634, 32960), (640, 32651), (824, 25360), (1030, 20288), (1268, 16480), (1585, 13184), (1648, 12680), (2060, 10144), (2536, 8240), (3170, 6592), (3296, 6340), (4120, 5072)]