21879039

素因数分解:

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

素因数の和:244

約数の個数: 36

約数和(自身を含む): 36889944

約数和(自身を除く): 15010905

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 107, 147, 273, 321, 637, 749, 1391, 1911, 2247, 4173, 5243, 9737, 11449, 15729, 29211, 34347, 68159, 80143, 148837, 204477, 240429, 446511, 561001, 1041859, 1683003, 3125577, 7293013, 21879039]

約数ペア:

[(1, 21879039), (3, 7293013), (7, 3125577), (13, 1683003), (21, 1041859), (39, 561001), (49, 446511), (91, 240429), (107, 204477), (147, 148837), (273, 80143), (321, 68159), (637, 34347), (749, 29211), (1391, 15729), (1911, 11449), (2247, 9737), (4173, 5243)]