20211280

素因数分解:

$2^4\times 5^1\times {\mathrm{252641}}^1$

素因数の和:252654

約数の個数: 20

約数和(自身を含む): 46991412

約数和(自身を除く): 26780132

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 252641, 505282, 1010564, 1263205, 2021128, 2526410, 4042256, 5052820, 10105640, 20211280]

約数ペア:

[(1, 20211280), (2, 10105640), (4, 5052820), (5, 4042256), (8, 2526410), (10, 2021128), (16, 1263205), (20, 1010564), (40, 505282), (80, 252641)]