20955760

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1627}}^1$

素因数の和:1670

約数の個数: 80

約数和(自身を含む): 58139136

約数和(自身を除く): 37183376

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 460, 560, 644, 805, 920, 1288, 1610, 1627, 1840, 2576, 3220, 3254, 6440, 6508, 8135, 11389, 12880, 13016, 16270, 22778, 26032, 32540, 37421, 45556, 56945, 65080, 74842, 91112, 113890, 130160, 149684, 182224, 187105, 227780, 261947, 299368, 374210, 455560, 523894, 598736, 748420, 911120, 1047788, 1309735, 1496840, 2095576, 2619470, 2993680, 4191152, 5238940, 10477880, 20955760]

約数ペア:

[(1, 20955760), (2, 10477880), (4, 5238940), (5, 4191152), (7, 2993680), (8, 2619470), (10, 2095576), (14, 1496840), (16, 1309735), (20, 1047788), (23, 911120), (28, 748420), (35, 598736), (40, 523894), (46, 455560), (56, 374210), (70, 299368), (80, 261947), (92, 227780), (112, 187105), (115, 182224), (140, 149684), (161, 130160), (184, 113890), (230, 91112), (280, 74842), (322, 65080), (368, 56945), (460, 45556), (560, 37421), (644, 32540), (805, 26032), (920, 22778), (1288, 16270), (1610, 13016), (1627, 12880), (1840, 11389), (2576, 8135), (3220, 6508), (3254, 6440)]