21000724815

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{179}}^1\times {\mathrm{769}}^1\times {\mathrm{1453}}^1$

素因数の和:2416

約数の個数: 64

約数和(自身を含む): 38692684800

約数和(自身を除く): 17691959985

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 179, 537, 769, 895, 1253, 1453, 2307, 2685, 3759, 3845, 4359, 5383, 6265, 7265, 10171, 11535, 16149, 18795, 21795, 26915, 30513, 50855, 80745, 137651, 152565, 260087, 412953, 688255, 780261, 963557, 1117357, 1300435, 1820609, 2064765, 2890671, 3352071, 3901305, 4817785, 5461827, 5586785, 7821499, 9103045, 14453355, 16760355, 23464497, 27309135, 39107495, 117322485, 200006903, 600020709, 1000034515, 1400048321, 3000103545, 4200144963, 7000241605, 21000724815]

約数ペア:

[(1, 21000724815), (3, 7000241605), (5, 4200144963), (7, 3000103545), (15, 1400048321), (21, 1000034515), (35, 600020709), (105, 200006903), (179, 117322485), (537, 39107495), (769, 27309135), (895, 23464497), (1253, 16760355), (1453, 14453355), (2307, 9103045), (2685, 7821499), (3759, 5586785), (3845, 5461827), (4359, 4817785), (5383, 3901305), (6265, 3352071), (7265, 2890671), (10171, 2064765), (11535, 1820609), (16149, 1300435), (18795, 1117357), (21795, 963557), (26915, 780261), (30513, 688255), (50855, 412953), (80745, 260087), (137651, 152565)]