20515761

素因数分解:

$3^5\times 7^2\times {\mathrm{1723}}^1$

素因数の和:1752

約数の個数: 36

約数和(自身を含む): 35769552

約数和(自身を除く): 15253791

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 243, 441, 567, 1323, 1701, 1723, 3969, 5169, 11907, 12061, 15507, 36183, 46521, 84427, 108549, 139563, 253281, 325647, 418689, 759843, 976941, 2279529, 2930823, 6838587, 20515761]

約数ペア:

[(1, 20515761), (3, 6838587), (7, 2930823), (9, 2279529), (21, 976941), (27, 759843), (49, 418689), (63, 325647), (81, 253281), (147, 139563), (189, 108549), (243, 84427), (441, 46521), (567, 36183), (1323, 15507), (1701, 12061), (1723, 11907), (3969, 5169)]