20909329

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{607}}^1$

素因数の和:677

約数の個数: 24

約数和(自身を含む): 26338560

約数和(自身を除く): 5429231

約数列:

[1, 7, 19, 37, 49, 133, 259, 607, 703, 931, 1813, 4249, 4921, 11533, 22459, 29743, 34447, 80731, 157213, 426721, 565117, 1100491, 2987047, 20909329]

約数ペア:

[(1, 20909329), (7, 2987047), (19, 1100491), (37, 565117), (49, 426721), (133, 157213), (259, 80731), (607, 34447), (703, 29743), (931, 22459), (1813, 11533), (4249, 4921)]