20689652

素因数分解:

$2^2\times {\mathrm{89}}^2\times {\mathrm{653}}^1$

素因数の和:835

約数の個数: 18

約数和(自身を含む): 36674358

約数和(自身を除く): 15984706

約数列:

[1, 2, 4, 89, 178, 356, 653, 1306, 2612, 7921, 15842, 31684, 58117, 116234, 232468, 5172413, 10344826, 20689652]

約数ペア:

[(1, 20689652), (2, 10344826), (4, 5172413), (89, 232468), (178, 116234), (356, 58117), (653, 31684), (1306, 15842), (2612, 7921)]