51216520

素因数分解:

$2^3\times 5^1\times {\mathrm{647}}^1\times {\mathrm{1979}}^1$

素因数の和:2637

約数の個数: 32

約数和(自身を含む): 115473600

約数和(自身を除く): 64257080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 647, 1294, 1979, 2588, 3235, 3958, 5176, 6470, 7916, 9895, 12940, 15832, 19790, 25880, 39580, 79160, 1280413, 2560826, 5121652, 6402065, 10243304, 12804130, 25608260, 51216520]

約数ペア:

[(1, 51216520), (2, 25608260), (4, 12804130), (5, 10243304), (8, 6402065), (10, 5121652), (20, 2560826), (40, 1280413), (647, 79160), (1294, 39580), (1979, 25880), (2588, 19790), (3235, 15832), (3958, 12940), (5176, 9895), (6470, 7916)]