21509881

素因数分解:

${\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{277}}^1$

素因数の和:424

約数の個数: 16

約数和(自身を含む): 23440960

約数和(自身を除く): 1931079

約数列:

[1, 19, 61, 67, 277, 1159, 1273, 4087, 5263, 16897, 18559, 77653, 321043, 352621, 1132099, 21509881]

約数ペア:

[(1, 21509881), (19, 1132099), (61, 352621), (67, 321043), (277, 77653), (1159, 18559), (1273, 16897), (4087, 5263)]