21280252

素因数分解:

$2^2\times 7^1\times {\mathrm{353}}^1\times {\mathrm{2153}}^1$

素因数の和:2517

約数の個数: 24

約数和(自身を含む): 42700896

約数和(自身を除く): 21420644

約数列:

[1, 2, 4, 7, 14, 28, 353, 706, 1412, 2153, 2471, 4306, 4942, 8612, 9884, 15071, 30142, 60284, 760009, 1520018, 3040036, 5320063, 10640126, 21280252]

約数ペア:

[(1, 21280252), (2, 10640126), (4, 5320063), (7, 3040036), (14, 1520018), (28, 760009), (353, 60284), (706, 30142), (1412, 15071), (2153, 9884), (2471, 8612), (4306, 4942)]