20810140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80039}}^1$

素因数の和:80061

約数の個数: 24

約数和(自身を含む): 47063520

約数和(自身を除く): 26253380

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80039, 160078, 320156, 400195, 800390, 1040507, 1600780, 2081014, 4162028, 5202535, 10405070, 20810140]

約数ペア:

[(1, 20810140), (2, 10405070), (4, 5202535), (5, 4162028), (10, 2081014), (13, 1600780), (20, 1040507), (26, 800390), (52, 400195), (65, 320156), (130, 160078), (260, 80039)]