645164

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{653}}^1$

素因数の和:689

約数の個数: 24

約数和(自身を含む): 1281840

約数和(自身を除く): 636676

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 494, 653, 988, 1306, 2612, 8489, 12407, 16978, 24814, 33956, 49628, 161291, 322582, 645164]

約数ペア:

[(1, 645164), (2, 322582), (4, 161291), (13, 49628), (19, 33956), (26, 24814), (38, 16978), (52, 12407), (76, 8489), (247, 2612), (494, 1306), (653, 988)]