2018201960

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{256117}}^1$

素因数の和:256325

約数の個数: 32

約数和(自身を含む): 4564022760

約数和(自身を除く): 2545820800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 3940, 7880, 256117, 512234, 1024468, 1280585, 2048936, 2561170, 5122340, 10244680, 50455049, 100910098, 201820196, 252275245, 403640392, 504550490, 1009100980, 2018201960]

約数ペア:

[(1, 2018201960), (2, 1009100980), (4, 504550490), (5, 403640392), (8, 252275245), (10, 201820196), (20, 100910098), (40, 50455049), (197, 10244680), (394, 5122340), (788, 2561170), (985, 2048936), (1576, 1280585), (1970, 1024468), (3940, 512234), (7880, 256117)]