20807828

素因数分解:

$2^2\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{1787}}^1$

素因数の和:1903

約数の個数: 24

約数和(自身を含む): 37848384

約数和(自身を除く): 17040556

約数列:

[1, 2, 4, 41, 71, 82, 142, 164, 284, 1787, 2911, 3574, 5822, 7148, 11644, 73267, 126877, 146534, 253754, 293068, 507508, 5201957, 10403914, 20807828]

約数ペア:

[(1, 20807828), (2, 10403914), (4, 5201957), (41, 507508), (71, 293068), (82, 253754), (142, 146534), (164, 126877), (284, 73267), (1787, 11644), (2911, 7148), (3574, 5822)]