20988688

素因数分解:

$2^4\times 7^1\times {\mathrm{67}}^1\times {\mathrm{2797}}^1$

素因数の和:2879

約数の個数: 40

約数和(自身を含む): 47185472

約数和(自身を除く): 26196784

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 67, 112, 134, 268, 469, 536, 938, 1072, 1876, 2797, 3752, 5594, 7504, 11188, 19579, 22376, 39158, 44752, 78316, 156632, 187399, 313264, 374798, 749596, 1311793, 1499192, 2623586, 2998384, 5247172, 10494344, 20988688]

約数ペア:

[(1, 20988688), (2, 10494344), (4, 5247172), (7, 2998384), (8, 2623586), (14, 1499192), (16, 1311793), (28, 749596), (56, 374798), (67, 313264), (112, 187399), (134, 156632), (268, 78316), (469, 44752), (536, 39158), (938, 22376), (1072, 19579), (1876, 11188), (2797, 7504), (3752, 5594)]