20499003

素因数分解:

$3^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:133

約数の個数: 72

約数和(自身を含む): 37559808

約数和(自身を除く): 17060805

約数列:

[1, 3, 7, 9, 21, 23, 43, 47, 49, 63, 69, 129, 141, 147, 161, 207, 301, 329, 387, 423, 441, 483, 903, 987, 989, 1081, 1127, 1449, 2021, 2107, 2303, 2709, 2961, 2967, 3243, 3381, 6063, 6321, 6909, 6923, 7567, 8901, 9729, 10143, 14147, 18189, 18963, 20727, 20769, 22701, 42441, 46483, 48461, 52969, 62307, 68103, 99029, 127323, 139449, 145383, 158907, 297087, 325381, 418347, 436149, 476721, 891261, 976143, 2277667, 2928429, 6833001, 20499003]

約数ペア:

[(1, 20499003), (3, 6833001), (7, 2928429), (9, 2277667), (21, 976143), (23, 891261), (43, 476721), (47, 436149), (49, 418347), (63, 325381), (69, 297087), (129, 158907), (141, 145383), (147, 139449), (161, 127323), (207, 99029), (301, 68103), (329, 62307), (387, 52969), (423, 48461), (441, 46483), (483, 42441), (903, 22701), (987, 20769), (989, 20727), (1081, 18963), (1127, 18189), (1449, 14147), (2021, 10143), (2107, 9729), (2303, 8901), (2709, 7567), (2961, 6923), (2967, 6909), (3243, 6321), (3381, 6063)]