21895915

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{313}}^1\times {\mathrm{823}}^1$

素因数の和:1158

約数の個数: 16

約数和(自身を含む): 27943488

約数和(自身を除く): 6047573

約数列:

[1, 5, 17, 85, 313, 823, 1565, 4115, 5321, 13991, 26605, 69955, 257599, 1287995, 4379183, 21895915]

約数ペア:

[(1, 21895915), (5, 4379183), (17, 1287995), (85, 257599), (313, 69955), (823, 26605), (1565, 13991), (4115, 5321)]