20855205

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{761}}^1$

素因数の和:811

約数の個数: 64

約数和(自身を含む): 43891200

約数和(自身を除く): 23035995

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 29, 35, 45, 63, 87, 105, 135, 145, 189, 203, 261, 315, 435, 609, 761, 783, 945, 1015, 1305, 1827, 2283, 3045, 3805, 3915, 5327, 5481, 6849, 9135, 11415, 15981, 20547, 22069, 26635, 27405, 34245, 47943, 66207, 79905, 102735, 110345, 143829, 154483, 198621, 239715, 331035, 463449, 595863, 719145, 772415, 993105, 1390347, 2317245, 2979315, 4171041, 6951735, 20855205]

約数ペア:

[(1, 20855205), (3, 6951735), (5, 4171041), (7, 2979315), (9, 2317245), (15, 1390347), (21, 993105), (27, 772415), (29, 719145), (35, 595863), (45, 463449), (63, 331035), (87, 239715), (105, 198621), (135, 154483), (145, 143829), (189, 110345), (203, 102735), (261, 79905), (315, 66207), (435, 47943), (609, 34245), (761, 27405), (783, 26635), (945, 22069), (1015, 20547), (1305, 15981), (1827, 11415), (2283, 9135), (3045, 6849), (3805, 5481), (3915, 5327)]