21945287

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{733}}^1$

素因数の和:807

約数の個数: 24

約数和(自身を含む): 28115136

約数和(自身を除く): 6169849

約数列:

[1, 7, 13, 47, 49, 91, 329, 611, 637, 733, 2303, 4277, 5131, 9529, 29939, 34451, 35917, 66703, 241157, 447863, 466921, 1688099, 3135041, 21945287]

約数ペア:

[(1, 21945287), (7, 3135041), (13, 1688099), (47, 466921), (49, 447863), (91, 241157), (329, 66703), (611, 35917), (637, 34451), (733, 29939), (2303, 9529), (4277, 5131)]