643900

素因数分解:

$2^2\times 5^2\times {\mathrm{47}}^1\times {\mathrm{137}}^1$

素因数の和:198

約数の個数: 36

約数和(自身を含む): 1437408

約数和(自身を除く): 793508

約数列:

[1, 2, 4, 5, 10, 20, 25, 47, 50, 94, 100, 137, 188, 235, 274, 470, 548, 685, 940, 1175, 1370, 2350, 2740, 3425, 4700, 6439, 6850, 12878, 13700, 25756, 32195, 64390, 128780, 160975, 321950, 643900]

約数ペア:

[(1, 643900), (2, 321950), (4, 160975), (5, 128780), (10, 64390), (20, 32195), (25, 25756), (47, 13700), (50, 12878), (94, 6850), (100, 6439), (137, 4700), (188, 3425), (235, 2740), (274, 2350), (470, 1370), (548, 1175), (685, 940)]