21272647

素因数分解:

${\mathrm{11}}^2\times {\mathrm{19}}^2\times {\mathrm{487}}^1$

素因数の和:547

約数の個数: 18

約数和(自身を含む): 24728424

約数和(自身を除く): 3455777

約数列:

[1, 11, 19, 121, 209, 361, 487, 2299, 3971, 5357, 9253, 43681, 58927, 101783, 175807, 1119613, 1933877, 21272647]

約数ペア:

[(1, 21272647), (11, 1933877), (19, 1119613), (121, 175807), (209, 101783), (361, 58927), (487, 43681), (2299, 9253), (3971, 5357)]