21513484

素因数分解:

$2^2\times {\mathrm{821}}^1\times {\mathrm{6551}}^1$

素因数の和:7376

約数の個数: 12

約数和(自身を含む): 37700208

約数和(自身を除く): 16186724

約数列:

[1, 2, 4, 821, 1642, 3284, 6551, 13102, 26204, 5378371, 10756742, 21513484]

約数ペア:

[(1, 21513484), (2, 10756742), (4, 5378371), (821, 26204), (1642, 13102), (3284, 6551)]