21692990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{991}}^1$

素因数の和:1208

約数の個数: 32

約数和(自身を含む): 42854400

約数和(自身を除く): 21161410

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 199, 398, 991, 995, 1982, 1990, 2189, 4378, 4955, 9910, 10901, 10945, 21802, 21890, 54505, 109010, 197209, 394418, 986045, 1972090, 2169299, 4338598, 10846495, 21692990]

約数ペア:

[(1, 21692990), (2, 10846495), (5, 4338598), (10, 2169299), (11, 1972090), (22, 986045), (55, 394418), (110, 197209), (199, 109010), (398, 54505), (991, 21890), (995, 21802), (1982, 10945), (1990, 10901), (2189, 9910), (4378, 4955)]