19907600

素因数分解:

$2^4\times 5^2\times {\mathrm{157}}^1\times {\mathrm{317}}^1$

素因数の和:492

約数の個数: 60

約数和(自身を含む): 48284484

約数和(自身を除く): 28376884

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 157, 200, 314, 317, 400, 628, 634, 785, 1256, 1268, 1570, 1585, 2512, 2536, 3140, 3170, 3925, 5072, 6280, 6340, 7850, 7925, 12560, 12680, 15700, 15850, 25360, 31400, 31700, 49769, 62800, 63400, 99538, 126800, 199076, 248845, 398152, 497690, 796304, 995380, 1244225, 1990760, 2488450, 3981520, 4976900, 9953800, 19907600]

約数ペア:

[(1, 19907600), (2, 9953800), (4, 4976900), (5, 3981520), (8, 2488450), (10, 1990760), (16, 1244225), (20, 995380), (25, 796304), (40, 497690), (50, 398152), (80, 248845), (100, 199076), (157, 126800), (200, 99538), (314, 63400), (317, 62800), (400, 49769), (628, 31700), (634, 31400), (785, 25360), (1256, 15850), (1268, 15700), (1570, 12680), (1585, 12560), (2512, 7925), (2536, 7850), (3140, 6340), (3170, 6280), (3925, 5072)]