21086681

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{181}}^1$

素因数の和:305

約数の個数: 32

約数和(自身を含む): 28304640

約数和(自身を除く): 7217959

約数列:

[1, 7, 11, 17, 77, 89, 119, 181, 187, 623, 979, 1267, 1309, 1513, 1991, 3077, 6853, 10591, 13937, 16109, 16643, 21539, 33847, 112763, 116501, 177199, 236929, 273853, 1240393, 1916971, 3012383, 21086681]

約数ペア:

[(1, 21086681), (7, 3012383), (11, 1916971), (17, 1240393), (77, 273853), (89, 236929), (119, 177199), (181, 116501), (187, 112763), (623, 33847), (979, 21539), (1267, 16643), (1309, 16109), (1513, 13937), (1991, 10591), (3077, 6853)]