21668432

素因数分解:

$2^4\times {\mathrm{139}}^1\times {\mathrm{9743}}^1$

素因数の和:9890

約数の個数: 20

約数和(自身を含む): 42288960

約数和(自身を除く): 20620528

約数列:

[1, 2, 4, 8, 16, 139, 278, 556, 1112, 2224, 9743, 19486, 38972, 77944, 155888, 1354277, 2708554, 5417108, 10834216, 21668432]

約数ペア:

[(1, 21668432), (2, 10834216), (4, 5417108), (8, 2708554), (16, 1354277), (139, 155888), (278, 77944), (556, 38972), (1112, 19486), (2224, 9743)]