20872852

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{401}}^1$

素因数の和:449

約数の個数: 72

約数和(自身を含む): 49436352

約数和(自身を除く): 28563500

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 52, 77, 91, 143, 154, 169, 182, 286, 308, 338, 364, 401, 572, 676, 802, 1001, 1183, 1604, 1859, 2002, 2366, 2807, 3718, 4004, 4411, 4732, 5213, 5614, 7436, 8822, 10426, 11228, 13013, 17644, 20852, 26026, 30877, 36491, 52052, 57343, 61754, 67769, 72982, 114686, 123508, 135538, 145964, 229372, 271076, 401401, 474383, 745459, 802802, 948766, 1490918, 1605604, 1897532, 2981836, 5218213, 10436426, 20872852]

約数ペア:

[(1, 20872852), (2, 10436426), (4, 5218213), (7, 2981836), (11, 1897532), (13, 1605604), (14, 1490918), (22, 948766), (26, 802802), (28, 745459), (44, 474383), (52, 401401), (77, 271076), (91, 229372), (143, 145964), (154, 135538), (169, 123508), (182, 114686), (286, 72982), (308, 67769), (338, 61754), (364, 57343), (401, 52052), (572, 36491), (676, 30877), (802, 26026), (1001, 20852), (1183, 17644), (1604, 13013), (1859, 11228), (2002, 10426), (2366, 8822), (2807, 7436), (3718, 5614), (4004, 5213), (4411, 4732)]