20781198

素因数分解:

$2^1\times 3^4\times {\mathrm{37}}^1\times {\mathrm{3467}}^1$

素因数の和:3518

約数の個数: 40

約数和(自身を含む): 47837592

約数和(自身を除く): 27056394

約数列:

[1, 2, 3, 6, 9, 18, 27, 37, 54, 74, 81, 111, 162, 222, 333, 666, 999, 1998, 2997, 3467, 5994, 6934, 10401, 20802, 31203, 62406, 93609, 128279, 187218, 256558, 280827, 384837, 561654, 769674, 1154511, 2309022, 3463533, 6927066, 10390599, 20781198]

約数ペア:

[(1, 20781198), (2, 10390599), (3, 6927066), (6, 3463533), (9, 2309022), (18, 1154511), (27, 769674), (37, 561654), (54, 384837), (74, 280827), (81, 256558), (111, 187218), (162, 128279), (222, 93609), (333, 62406), (666, 31203), (999, 20802), (1998, 10401), (2997, 6934), (3467, 5994)]