19720701

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{199}}^1$

素因数の和:247

約数の個数: 72

約数和(自身を含む): 38729600

約数和(自身を除く): 19008899

約数列:

[1, 3, 7, 9, 11, 13, 21, 33, 39, 63, 77, 91, 99, 117, 121, 143, 199, 231, 273, 363, 429, 597, 693, 819, 847, 1001, 1089, 1287, 1393, 1573, 1791, 2189, 2541, 2587, 3003, 4179, 4719, 6567, 7623, 7761, 9009, 11011, 12537, 14157, 15323, 18109, 19701, 23283, 24079, 28457, 33033, 45969, 54327, 72237, 85371, 99099, 137907, 162981, 168553, 199199, 216711, 256113, 313027, 505659, 597597, 939081, 1516977, 1792791, 2191189, 2817243, 6573567, 19720701]

約数ペア:

[(1, 19720701), (3, 6573567), (7, 2817243), (9, 2191189), (11, 1792791), (13, 1516977), (21, 939081), (33, 597597), (39, 505659), (63, 313027), (77, 256113), (91, 216711), (99, 199199), (117, 168553), (121, 162981), (143, 137907), (199, 99099), (231, 85371), (273, 72237), (363, 54327), (429, 45969), (597, 33033), (693, 28457), (819, 24079), (847, 23283), (1001, 19701), (1089, 18109), (1287, 15323), (1393, 14157), (1573, 12537), (1791, 11011), (2189, 9009), (2541, 7761), (2587, 7623), (3003, 6567), (4179, 4719)]