20611745

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{157}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 32277504

約数和(自身を除く): 11665759

約数列:

[1, 5, 7, 11, 31, 35, 55, 77, 121, 155, 157, 217, 341, 385, 605, 785, 847, 1085, 1099, 1705, 1727, 2387, 3751, 4235, 4867, 5495, 8635, 11935, 12089, 18755, 18997, 24335, 26257, 34069, 53537, 60445, 94985, 131285, 132979, 170345, 267685, 374759, 588907, 664895, 1873795, 2944535, 4122349, 20611745]

約数ペア:

[(1, 20611745), (5, 4122349), (7, 2944535), (11, 1873795), (31, 664895), (35, 588907), (55, 374759), (77, 267685), (121, 170345), (155, 132979), (157, 131285), (217, 94985), (341, 60445), (385, 53537), (605, 34069), (785, 26257), (847, 24335), (1085, 18997), (1099, 18755), (1705, 12089), (1727, 11935), (2387, 8635), (3751, 5495), (4235, 4867)]