21409245

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1109}}^1$

素因数の和:1147

約数の個数: 64

約数和(自身を含む): 44755200

約数和(自身を除く): 23345955

約数列:

[1, 3, 5, 9, 11, 13, 15, 27, 33, 39, 45, 55, 65, 99, 117, 135, 143, 165, 195, 297, 351, 429, 495, 585, 715, 1109, 1287, 1485, 1755, 2145, 3327, 3861, 5545, 6435, 9981, 12199, 14417, 16635, 19305, 29943, 36597, 43251, 49905, 60995, 72085, 109791, 129753, 149715, 158587, 182985, 216255, 329373, 389259, 475761, 548955, 648765, 792935, 1427283, 1646865, 1946295, 2378805, 4281849, 7136415, 21409245]

約数ペア:

[(1, 21409245), (3, 7136415), (5, 4281849), (9, 2378805), (11, 1946295), (13, 1646865), (15, 1427283), (27, 792935), (33, 648765), (39, 548955), (45, 475761), (55, 389259), (65, 329373), (99, 216255), (117, 182985), (135, 158587), (143, 149715), (165, 129753), (195, 109791), (297, 72085), (351, 60995), (429, 49905), (495, 43251), (585, 36597), (715, 29943), (1109, 19305), (1287, 16635), (1485, 14417), (1755, 12199), (2145, 9981), (3327, 6435), (3861, 5545)]