18815720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{149}}^1$

素因数の和:219

約数の個数: 128

約数和(自身を含む): 54432000

約数和(自身を除く): 35616280

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 41, 44, 55, 56, 70, 77, 82, 88, 110, 140, 149, 154, 164, 205, 220, 280, 287, 298, 308, 328, 385, 410, 440, 451, 574, 596, 616, 745, 770, 820, 902, 1043, 1148, 1192, 1435, 1490, 1540, 1639, 1640, 1804, 2086, 2255, 2296, 2870, 2980, 3080, 3157, 3278, 3608, 4172, 4510, 5215, 5740, 5960, 6109, 6314, 6556, 8195, 8344, 9020, 10430, 11473, 11480, 12218, 12628, 13112, 15785, 16390, 18040, 20860, 22946, 24436, 25256, 30545, 31570, 32780, 41720, 42763, 45892, 48872, 57365, 61090, 63140, 65560, 67199, 85526, 91784, 114730, 122180, 126280, 134398, 171052, 213815, 229460, 244360, 268796, 335995, 342104, 427630, 458920, 470393, 537592, 671990, 855260, 940786, 1343980, 1710520, 1881572, 2351965, 2687960, 3763144, 4703930, 9407860, 18815720]

約数ペア:

[(1, 18815720), (2, 9407860), (4, 4703930), (5, 3763144), (7, 2687960), (8, 2351965), (10, 1881572), (11, 1710520), (14, 1343980), (20, 940786), (22, 855260), (28, 671990), (35, 537592), (40, 470393), (41, 458920), (44, 427630), (55, 342104), (56, 335995), (70, 268796), (77, 244360), (82, 229460), (88, 213815), (110, 171052), (140, 134398), (149, 126280), (154, 122180), (164, 114730), (205, 91784), (220, 85526), (280, 67199), (287, 65560), (298, 63140), (308, 61090), (328, 57365), (385, 48872), (410, 45892), (440, 42763), (451, 41720), (574, 32780), (596, 31570), (616, 30545), (745, 25256), (770, 24436), (820, 22946), (902, 20860), (1043, 18040), (1148, 16390), (1192, 15785), (1435, 13112), (1490, 12628), (1540, 12218), (1639, 11480), (1640, 11473), (1804, 10430), (2086, 9020), (2255, 8344), (2296, 8195), (2870, 6556), (2980, 6314), (3080, 6109), (3157, 5960), (3278, 5740), (3608, 5215), (4172, 4510)]