21560539

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 31370976

約数和(自身を除く): 9810437

約数列:

[1, 7, 11, 13, 17, 49, 77, 91, 119, 143, 181, 187, 221, 539, 637, 833, 1001, 1267, 1309, 1547, 1991, 2353, 2431, 3077, 7007, 8869, 9163, 10829, 13937, 16471, 17017, 21539, 25883, 33847, 40001, 97559, 115297, 119119, 150773, 181181, 236929, 280007, 440011, 1268267, 1658503, 1960049, 3080077, 21560539]

約数ペア:

[(1, 21560539), (7, 3080077), (11, 1960049), (13, 1658503), (17, 1268267), (49, 440011), (77, 280007), (91, 236929), (119, 181181), (143, 150773), (181, 119119), (187, 115297), (221, 97559), (539, 40001), (637, 33847), (833, 25883), (1001, 21539), (1267, 17017), (1309, 16471), (1547, 13937), (1991, 10829), (2353, 9163), (2431, 8869), (3077, 7007)]