21136784

素因数分解:

$2^4\times {\mathrm{263}}^1\times {\mathrm{5023}}^1$

素因数の和:5294

約数の個数: 20

約数和(自身を含む): 41116416

約数和(自身を除く): 19979632

約数列:

[1, 2, 4, 8, 16, 263, 526, 1052, 2104, 4208, 5023, 10046, 20092, 40184, 80368, 1321049, 2642098, 5284196, 10568392, 21136784]

約数ペア:

[(1, 21136784), (2, 10568392), (4, 5284196), (8, 2642098), (16, 1321049), (263, 80368), (526, 40184), (1052, 20092), (2104, 10046), (4208, 5023)]