128900780

素因数分解:

$2^2\times 5^1\times {\mathrm{2459}}^1\times {\mathrm{2621}}^1$

素因数の和:5089

約数の個数: 24

約数和(自身を含む): 270905040

約数和(自身を除く): 142004260

約数列:

[1, 2, 4, 5, 10, 20, 2459, 2621, 4918, 5242, 9836, 10484, 12295, 13105, 24590, 26210, 49180, 52420, 6445039, 12890078, 25780156, 32225195, 64450390, 128900780]

約数ペア:

[(1, 128900780), (2, 64450390), (4, 32225195), (5, 25780156), (10, 12890078), (20, 6445039), (2459, 52420), (2621, 49180), (4918, 26210), (5242, 24590), (9836, 13105), (10484, 12295)]