21484813

素因数分解:

$7^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{311}}^1$

素因数の和:528

約数の個数: 16

約数和(自身を含む): 25159680

約数和(自身を除く): 3674867

約数列:

[1, 7, 71, 139, 311, 497, 973, 2177, 9869, 22081, 43229, 69083, 154567, 302603, 3069259, 21484813]

約数ペア:

[(1, 21484813), (7, 3069259), (71, 302603), (139, 154567), (311, 69083), (497, 43229), (973, 22081), (2177, 9869)]