21907985

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23431}}^1$

素因数の和:23464

約数の個数: 16

約数和(自身を含む): 30367872

約数和(自身を除く): 8459887

約数列:

[1, 5, 11, 17, 55, 85, 187, 935, 23431, 117155, 257741, 398327, 1288705, 1991635, 4381597, 21907985]

約数ペア:

[(1, 21907985), (5, 4381597), (11, 1991635), (17, 1288705), (55, 398327), (85, 257741), (187, 117155), (935, 23431)]