21205610

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{51721}}^1$

素因数の和:51769

約数の個数: 16

約数和(自身を含む): 39101832

約数和(自身を除く): 17896222

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 51721, 103442, 258605, 517210, 2120561, 4241122, 10602805, 21205610]

約数ペア:

[(1, 21205610), (2, 10602805), (5, 4241122), (10, 2120561), (41, 517210), (82, 258605), (205, 103442), (410, 51721)]