20879684

素因数分解:

$2^2\times 7^2\times {\mathrm{307}}^1\times {\mathrm{347}}^1$

素因数の和:672

約数の個数: 36

約数和(自身を含む): 42766416

約数和(自身を除く): 21886732

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 307, 347, 614, 694, 1228, 1388, 2149, 2429, 4298, 4858, 8596, 9716, 15043, 17003, 30086, 34006, 60172, 68012, 106529, 213058, 426116, 745703, 1491406, 2982812, 5219921, 10439842, 20879684]

約数ペア:

[(1, 20879684), (2, 10439842), (4, 5219921), (7, 2982812), (14, 1491406), (28, 745703), (49, 426116), (98, 213058), (196, 106529), (307, 68012), (347, 60172), (614, 34006), (694, 30086), (1228, 17003), (1388, 15043), (2149, 9716), (2429, 8596), (4298, 4858)]