20625021

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{241}}^1\times {\mathrm{257}}^1$

素因数の和:541

約数の個数: 24

約数和(自身を含む): 30843384

約数和(自身を除く): 10218363

約数列:

[1, 3, 9, 37, 111, 241, 257, 333, 723, 771, 2169, 2313, 8917, 9509, 26751, 28527, 61937, 80253, 85581, 185811, 557433, 2291669, 6875007, 20625021]

約数ペア:

[(1, 20625021), (3, 6875007), (9, 2291669), (37, 557433), (111, 185811), (241, 85581), (257, 80253), (333, 61937), (723, 28527), (771, 26751), (2169, 9509), (2313, 8917)]