18978080

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{263}}^1$

素因数の和:330

約数の個数: 96

約数和(自身を含む): 50295168

約数和(自身を除く): 31317088

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 41, 44, 55, 80, 82, 88, 110, 160, 164, 176, 205, 220, 263, 328, 352, 410, 440, 451, 526, 656, 820, 880, 902, 1052, 1312, 1315, 1640, 1760, 1804, 2104, 2255, 2630, 2893, 3280, 3608, 4208, 4510, 5260, 5786, 6560, 7216, 8416, 9020, 10520, 10783, 11572, 14432, 14465, 18040, 21040, 21566, 23144, 28930, 36080, 42080, 43132, 46288, 53915, 57860, 72160, 86264, 92576, 107830, 115720, 118613, 172528, 215660, 231440, 237226, 345056, 431320, 462880, 474452, 593065, 862640, 948904, 1186130, 1725280, 1897808, 2372260, 3795616, 4744520, 9489040, 18978080]

約数ペア:

[(1, 18978080), (2, 9489040), (4, 4744520), (5, 3795616), (8, 2372260), (10, 1897808), (11, 1725280), (16, 1186130), (20, 948904), (22, 862640), (32, 593065), (40, 474452), (41, 462880), (44, 431320), (55, 345056), (80, 237226), (82, 231440), (88, 215660), (110, 172528), (160, 118613), (164, 115720), (176, 107830), (205, 92576), (220, 86264), (263, 72160), (328, 57860), (352, 53915), (410, 46288), (440, 43132), (451, 42080), (526, 36080), (656, 28930), (820, 23144), (880, 21566), (902, 21040), (1052, 18040), (1312, 14465), (1315, 14432), (1640, 11572), (1760, 10783), (1804, 10520), (2104, 9020), (2255, 8416), (2630, 7216), (2893, 6560), (3280, 5786), (3608, 5260), (4208, 4510)]