20115640

素因数分解:

$2^3\times 5^1\times {\mathrm{283}}^1\times {\mathrm{1777}}^1$

素因数の和:2071

約数の個数: 32

約数和(自身を含む): 45445680

約数和(自身を除く): 25330040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 283, 566, 1132, 1415, 1777, 2264, 2830, 3554, 5660, 7108, 8885, 11320, 14216, 17770, 35540, 71080, 502891, 1005782, 2011564, 2514455, 4023128, 5028910, 10057820, 20115640]

約数ペア:

[(1, 20115640), (2, 10057820), (4, 5028910), (5, 4023128), (8, 2514455), (10, 2011564), (20, 1005782), (40, 502891), (283, 71080), (566, 35540), (1132, 17770), (1415, 14216), (1777, 11320), (2264, 8885), (2830, 7108), (3554, 5660)]