20210920

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{5209}}^1$

素因数の和:5317

約数の個数: 32

約数和(自身を含む): 45952200

約数和(自身を除く): 25741280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 5209, 10418, 20836, 26045, 41672, 52090, 104180, 208360, 505273, 1010546, 2021092, 2526365, 4042184, 5052730, 10105460, 20210920]

約数ペア:

[(1, 20210920), (2, 10105460), (4, 5052730), (5, 4042184), (8, 2526365), (10, 2021092), (20, 1010546), (40, 505273), (97, 208360), (194, 104180), (388, 52090), (485, 41672), (776, 26045), (970, 20836), (1940, 10418), (3880, 5209)]