17987879

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{2221}}^1$

素因数の和:2330

約数の個数: 16

約数和(自身を含む): 22397760

約数和(自身を除く): 4409881

約数列:

[1, 7, 13, 89, 91, 623, 1157, 2221, 8099, 15547, 28873, 197669, 202111, 1383683, 2569697, 17987879]

約数ペア:

[(1, 17987879), (7, 2569697), (13, 1383683), (89, 202111), (91, 197669), (623, 28873), (1157, 15547), (2221, 8099)]