20390816

素因数分解:

$2^5\times {\mathrm{643}}^1\times {\mathrm{991}}^1$

素因数の和:1644

約数の個数: 24

約数和(自身を含む): 40247424

約数和(自身を除く): 19856608

約数列:

[1, 2, 4, 8, 16, 32, 643, 991, 1286, 1982, 2572, 3964, 5144, 7928, 10288, 15856, 20576, 31712, 637213, 1274426, 2548852, 5097704, 10195408, 20390816]

約数ペア:

[(1, 20390816), (2, 10195408), (4, 5097704), (8, 2548852), (16, 1274426), (32, 637213), (643, 31712), (991, 20576), (1286, 15856), (1982, 10288), (2572, 7928), (3964, 5144)]