18972555

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{83}}^1\times {\mathrm{311}}^1$

素因数の和:416

約数の個数: 48

約数和(自身を含む): 35852544

約数和(自身を除く): 16879989

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 83, 105, 147, 245, 249, 311, 415, 581, 735, 933, 1245, 1555, 1743, 2177, 2905, 4067, 4665, 6531, 8715, 10885, 12201, 15239, 20335, 25813, 32655, 45717, 61005, 76195, 77439, 129065, 180691, 228585, 387195, 542073, 903455, 1264837, 2710365, 3794511, 6324185, 18972555]

約数ペア:

[(1, 18972555), (3, 6324185), (5, 3794511), (7, 2710365), (15, 1264837), (21, 903455), (35, 542073), (49, 387195), (83, 228585), (105, 180691), (147, 129065), (245, 77439), (249, 76195), (311, 61005), (415, 45717), (581, 32655), (735, 25813), (933, 20335), (1245, 15239), (1555, 12201), (1743, 10885), (2177, 8715), (2905, 6531), (4067, 4665)]