20817890

素因数分解:

$2^1\times 5^1\times {\mathrm{887}}^1\times {\mathrm{2347}}^1$

素因数の和:3241

約数の個数: 16

約数和(自身を含む): 37530432

約数和(自身を除く): 16712542

約数列:

[1, 2, 5, 10, 887, 1774, 2347, 4435, 4694, 8870, 11735, 23470, 2081789, 4163578, 10408945, 20817890]

約数ペア:

[(1, 20817890), (2, 10408945), (5, 4163578), (10, 2081789), (887, 23470), (1774, 11735), (2347, 8870), (4435, 4694)]