21680526

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{389}}^1\times {\mathrm{1327}}^1$

素因数の和:1728

約数の個数: 32

約数和(自身を含む): 49720320

約数和(自身を除く): 28039794

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 389, 778, 1167, 1327, 2334, 2654, 2723, 3981, 5446, 7962, 8169, 9289, 16338, 18578, 27867, 55734, 516203, 1032406, 1548609, 3097218, 3613421, 7226842, 10840263, 21680526]

約数ペア:

[(1, 21680526), (2, 10840263), (3, 7226842), (6, 3613421), (7, 3097218), (14, 1548609), (21, 1032406), (42, 516203), (389, 55734), (778, 27867), (1167, 18578), (1327, 16338), (2334, 9289), (2654, 8169), (2723, 7962), (3981, 5446)]