18627987

素因数分解:

$3^1\times 7^3\times {\mathrm{43}}^1\times {\mathrm{421}}^1$

素因数の和:488

約数の個数: 32

約数和(自身を含む): 29708800

約数和(自身を除く): 11080813

約数列:

[1, 3, 7, 21, 43, 49, 129, 147, 301, 343, 421, 903, 1029, 1263, 2107, 2947, 6321, 8841, 14749, 18103, 20629, 44247, 54309, 61887, 126721, 144403, 380163, 433209, 887047, 2661141, 6209329, 18627987]

約数ペア:

[(1, 18627987), (3, 6209329), (7, 2661141), (21, 887047), (43, 433209), (49, 380163), (129, 144403), (147, 126721), (301, 61887), (343, 54309), (421, 44247), (903, 20629), (1029, 18103), (1263, 14749), (2107, 8841), (2947, 6321)]