19687563

素因数分解:

$3^3\times 7^2\times {\mathrm{23}}^1\times {\mathrm{647}}^1$

素因数の和:693

約数の個数: 48

約数和(自身を含む): 35458560

約数和(自身を除く): 15770997

約数列:

[1, 3, 7, 9, 21, 23, 27, 49, 63, 69, 147, 161, 189, 207, 441, 483, 621, 647, 1127, 1323, 1449, 1941, 3381, 4347, 4529, 5823, 10143, 13587, 14881, 17469, 30429, 31703, 40761, 44643, 95109, 104167, 122283, 133929, 285327, 312501, 401787, 729169, 855981, 937503, 2187507, 2812509, 6562521, 19687563]

約数ペア:

[(1, 19687563), (3, 6562521), (7, 2812509), (9, 2187507), (21, 937503), (23, 855981), (27, 729169), (49, 401787), (63, 312501), (69, 285327), (147, 133929), (161, 122283), (189, 104167), (207, 95109), (441, 44643), (483, 40761), (621, 31703), (647, 30429), (1127, 17469), (1323, 14881), (1449, 13587), (1941, 10143), (3381, 5823), (4347, 4529)]