31981311

素因数分解:

$3^4\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:233

約数の個数: 40

約数和(自身を含む): 49762944

約数和(自身を除く): 17781633

約数列:

[1, 3, 9, 27, 67, 71, 81, 83, 201, 213, 249, 603, 639, 747, 1809, 1917, 2241, 4757, 5427, 5561, 5751, 5893, 6723, 14271, 16683, 17679, 42813, 50049, 53037, 128439, 150147, 159111, 385317, 394831, 450441, 477333, 1184493, 3553479, 10660437, 31981311]

約数ペア:

[(1, 31981311), (3, 10660437), (9, 3553479), (27, 1184493), (67, 477333), (71, 450441), (81, 394831), (83, 385317), (201, 159111), (213, 150147), (249, 128439), (603, 53037), (639, 50049), (747, 42813), (1809, 17679), (1917, 16683), (2241, 14271), (4757, 6723), (5427, 5893), (5561, 5751)]