640933479

素因数分解:

$3^4\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{953}}^1$

素因数の和:1026

約数の個数: 60

約数和(自身を含む): 1055528496

約数和(自身を除く): 414595017

約数列:

[1, 3, 9, 19, 23, 27, 57, 69, 81, 171, 207, 361, 437, 513, 621, 953, 1083, 1311, 1539, 1863, 2859, 3249, 3933, 8303, 8577, 9747, 11799, 18107, 21919, 24909, 25731, 29241, 35397, 54321, 65757, 74727, 77193, 162963, 197271, 224181, 344033, 416461, 488889, 591813, 672543, 1032099, 1249383, 1466667, 1775439, 3096297, 3748149, 7912759, 9288891, 11244447, 23738277, 27866673, 33733341, 71214831, 213644493, 640933479]

約数ペア:

[(1, 640933479), (3, 213644493), (9, 71214831), (19, 33733341), (23, 27866673), (27, 23738277), (57, 11244447), (69, 9288891), (81, 7912759), (171, 3748149), (207, 3096297), (361, 1775439), (437, 1466667), (513, 1249383), (621, 1032099), (953, 672543), (1083, 591813), (1311, 488889), (1539, 416461), (1863, 344033), (2859, 224181), (3249, 197271), (3933, 162963), (8303, 77193), (8577, 74727), (9747, 65757), (11799, 54321), (18107, 35397), (21919, 29241), (24909, 25731)]