20498601921

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{277}}^1\times {\mathrm{2137}}^1$

素因数の和:2538

約数の個数: 64

約数和(自身を含む): 33550659072

約数和(自身を除く): 13052057151

約数列:

[1, 3, 7, 17, 21, 51, 97, 119, 277, 291, 357, 679, 831, 1649, 1939, 2037, 2137, 4709, 4947, 5817, 6411, 11543, 14127, 14959, 26869, 32963, 34629, 36329, 44877, 80607, 98889, 108987, 188083, 207289, 254303, 456773, 564249, 591949, 621867, 762909, 1370319, 1451023, 1775847, 3197411, 3523913, 4143643, 4353069, 9592233, 10063133, 10571739, 12430929, 24667391, 30189399, 57419053, 70441931, 74002173, 172257159, 211325793, 401933371, 976123901, 1205800113, 2928371703, 6832867307, 20498601921]

約数ペア:

[(1, 20498601921), (3, 6832867307), (7, 2928371703), (17, 1205800113), (21, 976123901), (51, 401933371), (97, 211325793), (119, 172257159), (277, 74002173), (291, 70441931), (357, 57419053), (679, 30189399), (831, 24667391), (1649, 12430929), (1939, 10571739), (2037, 10063133), (2137, 9592233), (4709, 4353069), (4947, 4143643), (5817, 3523913), (6411, 3197411), (11543, 1775847), (14127, 1451023), (14959, 1370319), (26869, 762909), (32963, 621867), (34629, 591949), (36329, 564249), (44877, 456773), (80607, 254303), (98889, 207289), (108987, 188083)]