28912851

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{809}}^1$

素因数の和:864

約数の個数: 36

約数和(自身を含む): 48143160

約数和(自身を除く): 19230309

約数列:

[1, 3, 9, 11, 19, 33, 57, 99, 171, 209, 361, 627, 809, 1083, 1881, 2427, 3249, 3971, 7281, 8899, 11913, 15371, 26697, 35739, 46113, 80091, 138339, 169081, 292049, 507243, 876147, 1521729, 2628441, 3212539, 9637617, 28912851]

約数ペア:

[(1, 28912851), (3, 9637617), (9, 3212539), (11, 2628441), (19, 1521729), (33, 876147), (57, 507243), (99, 292049), (171, 169081), (209, 138339), (361, 80091), (627, 46113), (809, 35739), (1083, 26697), (1881, 15371), (2427, 11913), (3249, 8899), (3971, 7281)]