20402590

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{156943}}^1$

素因数の和:156963

約数の個数: 16

約数和(自身を含む): 39549888

約数和(自身を除く): 19147298

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 156943, 313886, 784715, 1569430, 2040259, 4080518, 10201295, 20402590]

約数ペア:

[(1, 20402590), (2, 10201295), (5, 4080518), (10, 2040259), (13, 1569430), (26, 784715), (65, 313886), (130, 156943)]