20513727

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13487}}^1$

素因数の和:13519

約数の個数: 18

約数和(自身を含む): 32087952

約数和(自身を除く): 11574225

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13487, 40461, 121383, 175331, 525993, 1577979, 2279303, 6837909, 20513727]

約数ペア:

[(1, 20513727), (3, 6837909), (9, 2279303), (13, 1577979), (39, 525993), (117, 175331), (169, 121383), (507, 40461), (1521, 13487)]