20765420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79867}}^1$

素因数の和:79889

約数の個数: 24

約数和(自身を含む): 46962384

約数和(自身を除く): 26196964

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 79867, 159734, 319468, 399335, 798670, 1038271, 1597340, 2076542, 4153084, 5191355, 10382710, 20765420]

約数ペア:

[(1, 20765420), (2, 10382710), (4, 5191355), (5, 4153084), (10, 2076542), (13, 1597340), (20, 1038271), (26, 798670), (52, 399335), (65, 319468), (130, 159734), (260, 79867)]