21000751863

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{107}}^2\times {\mathrm{6719}}^1$

素因数の和:6956

約数の個数: 48

約数和(自身を含む): 34793041920

約数和(自身を除く): 13792290057

約数列:

[1, 3, 7, 13, 21, 39, 91, 107, 273, 321, 749, 1391, 2247, 4173, 6719, 9737, 11449, 20157, 29211, 34347, 47033, 80143, 87347, 141099, 148837, 240429, 262041, 446511, 611429, 718933, 1041859, 1834287, 2156799, 3125577, 5032531, 9346129, 15097593, 28038387, 65422903, 76925831, 196268709, 230777493, 538480817, 1000035803, 1615442451, 3000107409, 7000250621, 21000751863]

約数ペア:

[(1, 21000751863), (3, 7000250621), (7, 3000107409), (13, 1615442451), (21, 1000035803), (39, 538480817), (91, 230777493), (107, 196268709), (273, 76925831), (321, 65422903), (749, 28038387), (1391, 15097593), (2247, 9346129), (4173, 5032531), (6719, 3125577), (9737, 2156799), (11449, 1834287), (20157, 1041859), (29211, 718933), (34347, 611429), (47033, 446511), (80143, 262041), (87347, 240429), (141099, 148837)]