19991065

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{479}}^1\times {\mathrm{491}}^1$

素因数の和:992

約数の個数: 16

約数和(自身を含む): 25505280

約数和(自身を除く): 5514215

約数列:

[1, 5, 17, 85, 479, 491, 2395, 2455, 8143, 8347, 40715, 41735, 235189, 1175945, 3998213, 19991065]

約数ペア:

[(1, 19991065), (5, 3998213), (17, 1175945), (85, 235189), (479, 41735), (491, 40715), (2395, 8347), (2455, 8143)]