21205016

素因数分解:

$2^3\times 7^1\times {\mathrm{378661}}^1$

素因数の和:378674

約数の個数: 16

約数和(自身を含む): 45439440

約数和(自身を除く): 24234424

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 378661, 757322, 1514644, 2650627, 3029288, 5301254, 10602508, 21205016]

約数ペア:

[(1, 21205016), (2, 10602508), (4, 5301254), (7, 3029288), (8, 2650627), (14, 1514644), (28, 757322), (56, 378661)]