21251804

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{929}}^1$

素因数の和:1002

約数の個数: 48

約数和(自身を含む): 45830400

約数和(自身を除く): 24578596

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 43, 76, 86, 133, 172, 266, 301, 532, 602, 817, 929, 1204, 1634, 1858, 3268, 3716, 5719, 6503, 11438, 13006, 17651, 22876, 26012, 35302, 39947, 70604, 79894, 123557, 159788, 247114, 279629, 494228, 559258, 758993, 1118516, 1517986, 3035972, 5312951, 10625902, 21251804]

約数ペア:

[(1, 21251804), (2, 10625902), (4, 5312951), (7, 3035972), (14, 1517986), (19, 1118516), (28, 758993), (38, 559258), (43, 494228), (76, 279629), (86, 247114), (133, 159788), (172, 123557), (266, 79894), (301, 70604), (532, 39947), (602, 35302), (817, 26012), (929, 22876), (1204, 17651), (1634, 13006), (1858, 11438), (3268, 6503), (3716, 5719)]