21512427

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1$

素因数の和:263

約数の個数: 32

約数和(自身を含む): 31595520

約数和(自身を除く): 10083093

約数列:

[1, 3, 19, 43, 57, 67, 129, 131, 201, 393, 817, 1273, 2451, 2489, 2881, 3819, 5633, 7467, 8643, 8777, 16899, 26331, 54739, 107027, 164217, 166763, 321081, 377411, 500289, 1132233, 7170809, 21512427]

約数ペア:

[(1, 21512427), (3, 7170809), (19, 1132233), (43, 500289), (57, 377411), (67, 321081), (129, 166763), (131, 164217), (201, 107027), (393, 54739), (817, 26331), (1273, 16899), (2451, 8777), (2489, 8643), (2881, 7467), (3819, 5633)]