20320839

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:161

約数の個数: 72

約数和(自身を含む): 38413440

約数和(自身を除く): 18092601

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 59, 63, 71, 77, 99, 147, 177, 213, 231, 413, 441, 497, 531, 539, 639, 649, 693, 781, 1239, 1491, 1617, 1947, 2343, 2891, 3479, 3717, 4189, 4473, 4543, 4851, 5467, 5841, 7029, 8673, 10437, 12567, 13629, 16401, 26019, 29323, 31311, 31801, 37701, 38269, 40887, 46079, 49203, 87969, 95403, 114807, 138237, 205261, 263907, 286209, 322553, 344421, 414711, 615783, 967659, 1847349, 2257871, 2902977, 6773613, 20320839]

約数ペア:

[(1, 20320839), (3, 6773613), (7, 2902977), (9, 2257871), (11, 1847349), (21, 967659), (33, 615783), (49, 414711), (59, 344421), (63, 322553), (71, 286209), (77, 263907), (99, 205261), (147, 138237), (177, 114807), (213, 95403), (231, 87969), (413, 49203), (441, 46079), (497, 40887), (531, 38269), (539, 37701), (639, 31801), (649, 31311), (693, 29323), (781, 26019), (1239, 16401), (1491, 13629), (1617, 12567), (1947, 10437), (2343, 8673), (2891, 7029), (3479, 5841), (3717, 5467), (4189, 4851), (4473, 4543)]