638565338

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{236681}}^1$

素因数の和:236773

約数の個数: 16

約数和(自身を含む): 1022466240

約数和(自身を除く): 383900902

約数列:

[1, 2, 19, 38, 71, 142, 1349, 2698, 236681, 473362, 4496939, 8993878, 16804351, 33608702, 319282669, 638565338]

約数ペア:

[(1, 638565338), (2, 319282669), (19, 33608702), (38, 16804351), (71, 8993878), (142, 4496939), (1349, 473362), (2698, 236681)]