20498140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78839}}^1$

素因数の和:78861

約数の個数: 24

約数和(自身を含む): 46357920

約数和(自身を除く): 25859780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78839, 157678, 315356, 394195, 788390, 1024907, 1576780, 2049814, 4099628, 5124535, 10249070, 20498140]

約数ペア:

[(1, 20498140), (2, 10249070), (4, 5124535), (5, 4099628), (10, 2049814), (13, 1576780), (20, 1024907), (26, 788390), (52, 394195), (65, 315356), (130, 157678), (260, 78839)]