51456320

素因数分解:

$2^6\times 5^1\times {\mathrm{401}}^2$

素因数の和:819

約数の個数: 42

約数和(自身を含む): 122836686

約数和(自身を除く): 71380366

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 401, 802, 1604, 2005, 3208, 4010, 6416, 8020, 12832, 16040, 25664, 32080, 64160, 128320, 160801, 321602, 643204, 804005, 1286408, 1608010, 2572816, 3216020, 5145632, 6432040, 10291264, 12864080, 25728160, 51456320]

約数ペア:

[(1, 51456320), (2, 25728160), (4, 12864080), (5, 10291264), (8, 6432040), (10, 5145632), (16, 3216020), (20, 2572816), (32, 1608010), (40, 1286408), (64, 804005), (80, 643204), (160, 321602), (320, 160801), (401, 128320), (802, 64160), (1604, 32080), (2005, 25664), (3208, 16040), (4010, 12832), (6416, 8020)]