28004660

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{20899}}^1$

素因数の和:20975

約数の個数: 24

約数和(自身を含む): 59690400

約数和(自身を除く): 31685740

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1340, 20899, 41798, 83596, 104495, 208990, 417980, 1400233, 2800466, 5600932, 7001165, 14002330, 28004660]

約数ペア:

[(1, 28004660), (2, 14002330), (4, 7001165), (5, 5600932), (10, 2800466), (20, 1400233), (67, 417980), (134, 208990), (268, 104495), (335, 83596), (670, 41798), (1340, 20899)]