20990576

素因数分解:

$2^4\times {\mathrm{47}}^1\times {\mathrm{103}}^1\times {\mathrm{271}}^1$

素因数の和:429

約数の個数: 40

約数和(自身を含む): 42092544

約数和(自身を除く): 21101968

約数列:

[1, 2, 4, 8, 16, 47, 94, 103, 188, 206, 271, 376, 412, 542, 752, 824, 1084, 1648, 2168, 4336, 4841, 9682, 12737, 19364, 25474, 27913, 38728, 50948, 55826, 77456, 101896, 111652, 203792, 223304, 446608, 1311911, 2623822, 5247644, 10495288, 20990576]

約数ペア:

[(1, 20990576), (2, 10495288), (4, 5247644), (8, 2623822), (16, 1311911), (47, 446608), (94, 223304), (103, 203792), (188, 111652), (206, 101896), (271, 77456), (376, 55826), (412, 50948), (542, 38728), (752, 27913), (824, 25474), (1084, 19364), (1648, 12737), (2168, 9682), (4336, 4841)]