401980909

素因数分解:

${\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{181}}^1\times {\mathrm{1999}}^1$

素因数の和:2292

約数の個数: 16

約数和(自身を含む): 445536000

約数和(自身を除く): 43555091

約数列:

[1, 11, 101, 181, 1111, 1991, 1999, 18281, 21989, 201091, 201899, 361819, 2220889, 3980009, 36543719, 401980909]

約数ペア:

[(1, 401980909), (11, 36543719), (101, 3980009), (181, 2220889), (1111, 361819), (1991, 201899), (1999, 201091), (18281, 21989)]