18920145

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{173}}^1\times {\mathrm{317}}^1$

素因数の和:521

約数の個数: 32

約数和(自身を含む): 31871232

約数和(自身を除く): 12951087

約数列:

[1, 3, 5, 15, 23, 69, 115, 173, 317, 345, 519, 865, 951, 1585, 2595, 3979, 4755, 7291, 11937, 19895, 21873, 36455, 54841, 59685, 109365, 164523, 274205, 822615, 1261343, 3784029, 6306715, 18920145]

約数ペア:

[(1, 18920145), (3, 6306715), (5, 3784029), (15, 1261343), (23, 822615), (69, 274205), (115, 164523), (173, 109365), (317, 59685), (345, 54841), (519, 36455), (865, 21873), (951, 19895), (1585, 11937), (2595, 7291), (3979, 4755)]