21200810

素因数分解:

$2^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{31643}}^1$

素因数の和:31717

約数の個数: 16

約数和(自身を含む): 38732256

約数和(自身を除く): 17531446

約数列:

[1, 2, 5, 10, 67, 134, 335, 670, 31643, 63286, 158215, 316430, 2120081, 4240162, 10600405, 21200810]

約数ペア:

[(1, 21200810), (2, 10600405), (5, 4240162), (10, 2120081), (67, 316430), (134, 158215), (335, 63286), (670, 31643)]