19961605

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{173}}^1\times {\mathrm{491}}^1$

素因数の和:716

約数の個数: 16

約数和(自身を含む): 24655104

約数和(自身を除く): 4693499

約数列:

[1, 5, 47, 173, 235, 491, 865, 2455, 8131, 23077, 40655, 84943, 115385, 424715, 3992321, 19961605]

約数ペア:

[(1, 19961605), (5, 3992321), (47, 424715), (173, 115385), (235, 84943), (491, 40655), (865, 23077), (2455, 8131)]