20859916

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{47}}^1\times {\mathrm{131}}^1$

素因数の和:211

約数の個数: 72

約数和(自身を含む): 47190528

約数和(自身を除く): 26330612

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 47, 77, 94, 121, 131, 154, 188, 242, 262, 308, 329, 484, 517, 524, 658, 847, 917, 1034, 1316, 1441, 1694, 1834, 2068, 2882, 3388, 3619, 3668, 5687, 5764, 6157, 7238, 10087, 11374, 12314, 14476, 15851, 20174, 22748, 24628, 31702, 39809, 40348, 43099, 63404, 67727, 79618, 86198, 110957, 135454, 159236, 172396, 221914, 270908, 443828, 474089, 744997, 948178, 1489994, 1896356, 2979988, 5214979, 10429958, 20859916]

約数ペア:

[(1, 20859916), (2, 10429958), (4, 5214979), (7, 2979988), (11, 1896356), (14, 1489994), (22, 948178), (28, 744997), (44, 474089), (47, 443828), (77, 270908), (94, 221914), (121, 172396), (131, 159236), (154, 135454), (188, 110957), (242, 86198), (262, 79618), (308, 67727), (329, 63404), (484, 43099), (517, 40348), (524, 39809), (658, 31702), (847, 24628), (917, 22748), (1034, 20174), (1316, 15851), (1441, 14476), (1694, 12314), (1834, 11374), (2068, 10087), (2882, 7238), (3388, 6157), (3619, 5764), (3668, 5687)]