20005180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{76943}}^1$

素因数の和:76965

約数の個数: 24

約数和(自身を含む): 45243072

約数和(自身を除く): 25237892

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 76943, 153886, 307772, 384715, 769430, 1000259, 1538860, 2000518, 4001036, 5001295, 10002590, 20005180]

約数ペア:

[(1, 20005180), (2, 10002590), (4, 5001295), (5, 4001036), (10, 2000518), (13, 1538860), (20, 1000259), (26, 769430), (52, 384715), (65, 307772), (130, 153886), (260, 76943)]