20703165

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{73}}^2$

素因数の和:198

約数の個数: 48

約数和(自身を含む): 39420288

約数和(自身を除く): 18717123

約数列:

[1, 3, 5, 7, 15, 21, 35, 37, 73, 105, 111, 185, 219, 259, 365, 511, 555, 777, 1095, 1295, 1533, 2555, 2701, 3885, 5329, 7665, 8103, 13505, 15987, 18907, 26645, 37303, 40515, 56721, 79935, 94535, 111909, 186515, 197173, 283605, 559545, 591519, 985865, 1380211, 2957595, 4140633, 6901055, 20703165]

約数ペア:

[(1, 20703165), (3, 6901055), (5, 4140633), (7, 2957595), (15, 1380211), (21, 985865), (35, 591519), (37, 559545), (73, 283605), (105, 197173), (111, 186515), (185, 111909), (219, 94535), (259, 79935), (365, 56721), (511, 40515), (555, 37303), (777, 26645), (1095, 18907), (1295, 15987), (1533, 13505), (2555, 8103), (2701, 7665), (3885, 5329)]