21206564

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{839}}^1$

素因数の和:1003

約数の個数: 24

約数和(自身を含む): 38102400

約数和(自身を除く): 16895836

約数列:

[1, 2, 4, 71, 89, 142, 178, 284, 356, 839, 1678, 3356, 6319, 12638, 25276, 59569, 74671, 119138, 149342, 238276, 298684, 5301641, 10603282, 21206564]

約数ペア:

[(1, 21206564), (2, 10603282), (4, 5301641), (71, 298684), (89, 238276), (142, 149342), (178, 119138), (284, 74671), (356, 59569), (839, 25276), (1678, 12638), (3356, 6319)]