80109820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{353}}^1\times {\mathrm{1621}}^1$

素因数の和:1990

約数の個数: 48

約数和(自身を含む): 192927168

約数和(自身を除く): 112817348

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 353, 706, 1412, 1621, 1765, 2471, 3242, 3530, 4942, 6484, 7060, 8105, 9884, 11347, 12355, 16210, 22694, 24710, 32420, 45388, 49420, 56735, 113470, 226940, 572213, 1144426, 2288852, 2861065, 4005491, 5722130, 8010982, 11444260, 16021964, 20027455, 40054910, 80109820]

約数ペア:

[(1, 80109820), (2, 40054910), (4, 20027455), (5, 16021964), (7, 11444260), (10, 8010982), (14, 5722130), (20, 4005491), (28, 2861065), (35, 2288852), (70, 1144426), (140, 572213), (353, 226940), (706, 113470), (1412, 56735), (1621, 49420), (1765, 45388), (2471, 32420), (3242, 24710), (3530, 22694), (4942, 16210), (6484, 12355), (7060, 11347), (8105, 9884)]