20390895

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{3407}}^1$

素因数の和:3444

約数の個数: 48

約数和(自身を含む): 42531840

約数和(自身を除く): 22140945

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 35, 45, 57, 63, 95, 105, 133, 171, 285, 315, 399, 665, 855, 1197, 1995, 3407, 5985, 10221, 17035, 23849, 30663, 51105, 64733, 71547, 119245, 153315, 194199, 214641, 323665, 357735, 453131, 582597, 970995, 1073205, 1359393, 2265655, 2912985, 4078179, 6796965, 20390895]

約数ペア:

[(1, 20390895), (3, 6796965), (5, 4078179), (7, 2912985), (9, 2265655), (15, 1359393), (19, 1073205), (21, 970995), (35, 582597), (45, 453131), (57, 357735), (63, 323665), (95, 214641), (105, 194199), (133, 153315), (171, 119245), (285, 71547), (315, 64733), (399, 51105), (665, 30663), (855, 23849), (1197, 17035), (1995, 10221), (3407, 5985)]