20981181

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{1427}}^1$

素因数の和:1485

約数の個数: 24

約数和(自身を含む): 31358880

約数和(自身を除く): 10377699

約数列:

[1, 3, 13, 29, 39, 87, 169, 377, 507, 1131, 1427, 4281, 4901, 14703, 18551, 41383, 55653, 124149, 241163, 537979, 723489, 1613937, 6993727, 20981181]

約数ペア:

[(1, 20981181), (3, 6993727), (13, 1613937), (29, 723489), (39, 537979), (87, 241163), (169, 124149), (377, 55653), (507, 41383), (1131, 18551), (1427, 14703), (4281, 4901)]