20999264

素因数分解:

$2^5\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{353}}^1$

素因数の和:400

約数の個数: 72

約数和(自身を含む): 48975192

約数和(自身を除く): 27975928

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 32, 44, 52, 88, 104, 143, 169, 176, 208, 286, 338, 352, 353, 416, 572, 676, 706, 1144, 1352, 1412, 1859, 2288, 2704, 2824, 3718, 3883, 4576, 4589, 5408, 5648, 7436, 7766, 9178, 11296, 14872, 15532, 18356, 29744, 31064, 36712, 50479, 59488, 59657, 62128, 73424, 100958, 119314, 124256, 146848, 201916, 238628, 403832, 477256, 656227, 807664, 954512, 1312454, 1615328, 1909024, 2624908, 5249816, 10499632, 20999264]

約数ペア:

[(1, 20999264), (2, 10499632), (4, 5249816), (8, 2624908), (11, 1909024), (13, 1615328), (16, 1312454), (22, 954512), (26, 807664), (32, 656227), (44, 477256), (52, 403832), (88, 238628), (104, 201916), (143, 146848), (169, 124256), (176, 119314), (208, 100958), (286, 73424), (338, 62128), (352, 59657), (353, 59488), (416, 50479), (572, 36712), (676, 31064), (706, 29744), (1144, 18356), (1352, 15532), (1412, 14872), (1859, 11296), (2288, 9178), (2704, 7766), (2824, 7436), (3718, 5648), (3883, 5408), (4576, 4589)]