642978

素因数分解:

$2^1\times 3^8\times 7^2$

素因数の和:40

約数の個数: 54

約数和(自身を含む): 1682811

約数和(自身を除く): 1039833

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 49, 54, 63, 81, 98, 126, 147, 162, 189, 243, 294, 378, 441, 486, 567, 729, 882, 1134, 1323, 1458, 1701, 2187, 2646, 3402, 3969, 4374, 5103, 6561, 7938, 10206, 11907, 13122, 15309, 23814, 30618, 35721, 45927, 71442, 91854, 107163, 214326, 321489, 642978]

約数ペア:

[(1, 642978), (2, 321489), (3, 214326), (6, 107163), (7, 91854), (9, 71442), (14, 45927), (18, 35721), (21, 30618), (27, 23814), (42, 15309), (49, 13122), (54, 11907), (63, 10206), (81, 7938), (98, 6561), (126, 5103), (147, 4374), (162, 3969), (189, 3402), (243, 2646), (294, 2187), (378, 1701), (441, 1458), (486, 1323), (567, 1134), (729, 882)]