180400

素因数分解:

$2^4\times 5^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1$

素因数の和:70

約数の個数: 60

約数和(自身を含む): 484344

約数和(自身を除く): 303944

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 40, 41, 44, 50, 55, 80, 82, 88, 100, 110, 164, 176, 200, 205, 220, 275, 328, 400, 410, 440, 451, 550, 656, 820, 880, 902, 1025, 1100, 1640, 1804, 2050, 2200, 2255, 3280, 3608, 4100, 4400, 4510, 7216, 8200, 9020, 11275, 16400, 18040, 22550, 36080, 45100, 90200, 180400]

約数ペア:

[(1, 180400), (2, 90200), (4, 45100), (5, 36080), (8, 22550), (10, 18040), (11, 16400), (16, 11275), (20, 9020), (22, 8200), (25, 7216), (40, 4510), (41, 4400), (44, 4100), (50, 3608), (55, 3280), (80, 2255), (82, 2200), (88, 2050), (100, 1804), (110, 1640), (164, 1100), (176, 1025), (200, 902), (205, 880), (220, 820), (275, 656), (328, 550), (400, 451), (410, 440)]