81336440

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{20963}}^1$

素因数の和:21071

約数の個数: 32

約数和(自身を含む): 184902480

約数和(自身を除く): 103566040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 20963, 41926, 83852, 104815, 167704, 209630, 419260, 838520, 2033411, 4066822, 8133644, 10167055, 16267288, 20334110, 40668220, 81336440]

約数ペア:

[(1, 81336440), (2, 40668220), (4, 20334110), (5, 16267288), (8, 10167055), (10, 8133644), (20, 4066822), (40, 2033411), (97, 838520), (194, 419260), (388, 209630), (485, 167704), (776, 104815), (970, 83852), (1940, 41926), (3880, 20963)]