81234680

素因数分解:

$2^3\times 5^1\times {\mathrm{1019}}^1\times {\mathrm{1993}}^1$

素因数の和:3023

約数の個数: 32

約数和(自身を含む): 183049200

約数和(自身を除く): 101814520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1019, 1993, 2038, 3986, 4076, 5095, 7972, 8152, 9965, 10190, 15944, 19930, 20380, 39860, 40760, 79720, 2030867, 4061734, 8123468, 10154335, 16246936, 20308670, 40617340, 81234680]

約数ペア:

[(1, 81234680), (2, 40617340), (4, 20308670), (5, 16246936), (8, 10154335), (10, 8123468), (20, 4061734), (40, 2030867), (1019, 79720), (1993, 40760), (2038, 39860), (3986, 20380), (4076, 19930), (5095, 15944), (7972, 10190), (8152, 9965)]