20916160

素因数分解:

$2^6\times 5^1\times {\mathrm{163}}^1\times {\mathrm{401}}^1$

素因数の和:581

約数の個数: 56

約数和(自身を含む): 50237136

約数和(自身を除く): 29320976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 163, 320, 326, 401, 652, 802, 815, 1304, 1604, 1630, 2005, 2608, 3208, 3260, 4010, 5216, 6416, 6520, 8020, 10432, 12832, 13040, 16040, 25664, 26080, 32080, 52160, 64160, 65363, 128320, 130726, 261452, 326815, 522904, 653630, 1045808, 1307260, 2091616, 2614520, 4183232, 5229040, 10458080, 20916160]

約数ペア:

[(1, 20916160), (2, 10458080), (4, 5229040), (5, 4183232), (8, 2614520), (10, 2091616), (16, 1307260), (20, 1045808), (32, 653630), (40, 522904), (64, 326815), (80, 261452), (160, 130726), (163, 128320), (320, 65363), (326, 64160), (401, 52160), (652, 32080), (802, 26080), (815, 25664), (1304, 16040), (1604, 13040), (1630, 12832), (2005, 10432), (2608, 8020), (3208, 6520), (3260, 6416), (4010, 5216)]