18928455

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{283}}^1$

素因数の和:325

約数の個数: 64

約数和(自身を含む): 38169600

約数和(自身を除く): 19241145

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 49, 65, 91, 105, 147, 195, 245, 273, 283, 343, 455, 637, 735, 849, 1029, 1365, 1415, 1715, 1911, 1981, 3185, 3679, 4245, 4459, 5145, 5943, 9555, 9905, 11037, 13377, 13867, 18395, 22295, 25753, 29715, 41601, 55185, 66885, 69335, 77259, 97069, 128765, 180271, 208005, 291207, 386295, 485345, 540813, 901355, 1261897, 1456035, 2704065, 3785691, 6309485, 18928455]

約数ペア:

[(1, 18928455), (3, 6309485), (5, 3785691), (7, 2704065), (13, 1456035), (15, 1261897), (21, 901355), (35, 540813), (39, 485345), (49, 386295), (65, 291207), (91, 208005), (105, 180271), (147, 128765), (195, 97069), (245, 77259), (273, 69335), (283, 66885), (343, 55185), (455, 41601), (637, 29715), (735, 25753), (849, 22295), (1029, 18395), (1365, 13867), (1415, 13377), (1715, 11037), (1911, 9905), (1981, 9555), (3185, 5943), (3679, 5145), (4245, 4459)]