20657416

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{647}}^1$

素因数の和:973

約数の個数: 32

約数和(自身を含む): 41912640

約数和(自身を除く): 21255224

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 307, 614, 647, 1228, 1294, 2456, 2588, 3991, 5176, 7982, 8411, 15964, 16822, 31928, 33644, 67288, 198629, 397258, 794516, 1589032, 2582177, 5164354, 10328708, 20657416]

約数ペア:

[(1, 20657416), (2, 10328708), (4, 5164354), (8, 2582177), (13, 1589032), (26, 794516), (52, 397258), (104, 198629), (307, 67288), (614, 33644), (647, 31928), (1228, 16822), (1294, 15964), (2456, 8411), (2588, 7982), (3991, 5176)]