31906120

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{4049}}^1$

素因数の和:4257

約数の個数: 32

約数和(自身を含む): 72171000

約数和(自身を除く): 40264880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 3940, 4049, 7880, 8098, 16196, 20245, 32392, 40490, 80980, 161960, 797653, 1595306, 3190612, 3988265, 6381224, 7976530, 15953060, 31906120]

約数ペア:

[(1, 31906120), (2, 15953060), (4, 7976530), (5, 6381224), (8, 3988265), (10, 3190612), (20, 1595306), (40, 797653), (197, 161960), (394, 80980), (788, 40490), (985, 32392), (1576, 20245), (1970, 16196), (3940, 8098), (4049, 7880)]