20180545

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:142

約数の個数: 64

約数和(自身を含む): 32845824

約数和(自身を除く): 12665279

約数列:

[1, 5, 7, 11, 23, 35, 43, 53, 55, 77, 115, 161, 215, 253, 265, 301, 371, 385, 473, 583, 805, 989, 1219, 1265, 1505, 1771, 1855, 2279, 2365, 2915, 3311, 4081, 4945, 6095, 6923, 8533, 8855, 10879, 11395, 13409, 15953, 16555, 20405, 25069, 34615, 42665, 52417, 54395, 67045, 76153, 79765, 93863, 125345, 175483, 262085, 366919, 380765, 469315, 576587, 877415, 1834595, 2882935, 4036109, 20180545]

約数ペア:

[(1, 20180545), (5, 4036109), (7, 2882935), (11, 1834595), (23, 877415), (35, 576587), (43, 469315), (53, 380765), (55, 366919), (77, 262085), (115, 175483), (161, 125345), (215, 93863), (253, 79765), (265, 76153), (301, 67045), (371, 54395), (385, 52417), (473, 42665), (583, 34615), (805, 25069), (989, 20405), (1219, 16555), (1265, 15953), (1505, 13409), (1771, 11395), (1855, 10879), (2279, 8855), (2365, 8533), (2915, 6923), (3311, 6095), (4081, 4945)]