721436247

素因数分解:

$3^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{2087}}^1$

素因数の和:2193

約数の個数: 64

約数和(自身を含む): 1282867200

約数和(自身を除く): 561430953

約数列:

[1, 3, 7, 9, 21, 27, 31, 59, 63, 93, 177, 189, 217, 279, 413, 531, 651, 837, 1239, 1593, 1829, 1953, 2087, 3717, 5487, 5859, 6261, 11151, 12803, 14609, 16461, 18783, 38409, 43827, 49383, 56349, 64697, 115227, 123133, 131481, 194091, 345681, 369399, 394443, 452879, 582273, 861931, 1108197, 1358637, 1746819, 2585793, 3324591, 3817123, 4075911, 7757379, 11451369, 12227733, 23272137, 26719861, 34354107, 80159583, 103062321, 240478749, 721436247]

約数ペア:

[(1, 721436247), (3, 240478749), (7, 103062321), (9, 80159583), (21, 34354107), (27, 26719861), (31, 23272137), (59, 12227733), (63, 11451369), (93, 7757379), (177, 4075911), (189, 3817123), (217, 3324591), (279, 2585793), (413, 1746819), (531, 1358637), (651, 1108197), (837, 861931), (1239, 582273), (1593, 452879), (1829, 394443), (1953, 369399), (2087, 345681), (3717, 194091), (5487, 131481), (5859, 123133), (6261, 115227), (11151, 64697), (12803, 56349), (14609, 49383), (16461, 43827), (18783, 38409)]