19707849

素因数分解:

$3^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1$

素因数の和:139

約数の個数: 72

約数和(自身を含む): 36279360

約数和(自身を除く): 16571511

約数列:

[1, 3, 7, 9, 21, 23, 29, 49, 63, 67, 69, 87, 147, 161, 201, 203, 207, 261, 441, 469, 483, 603, 609, 667, 1127, 1407, 1421, 1449, 1541, 1827, 1943, 2001, 3283, 3381, 4221, 4263, 4623, 4669, 5829, 6003, 9849, 10143, 10787, 12789, 13601, 13869, 14007, 17487, 29547, 32361, 32683, 40803, 42021, 44689, 75509, 95207, 97083, 98049, 122409, 134067, 226527, 285621, 294147, 312823, 402201, 679581, 856863, 938469, 2189761, 2815407, 6569283, 19707849]

約数ペア:

[(1, 19707849), (3, 6569283), (7, 2815407), (9, 2189761), (21, 938469), (23, 856863), (29, 679581), (49, 402201), (63, 312823), (67, 294147), (69, 285621), (87, 226527), (147, 134067), (161, 122409), (201, 98049), (203, 97083), (207, 95207), (261, 75509), (441, 44689), (469, 42021), (483, 40803), (603, 32683), (609, 32361), (667, 29547), (1127, 17487), (1407, 14007), (1421, 13869), (1449, 13601), (1541, 12789), (1827, 10787), (1943, 10143), (2001, 9849), (3283, 6003), (3381, 5829), (4221, 4669), (4263, 4623)]