81212080

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^2\times {\mathrm{101}}^1$

素因数の和:179

約数の個数: 120

約数和(自身を含む): 209830320

約数和(自身を除く): 128618240

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 23, 38, 40, 46, 76, 80, 92, 95, 101, 115, 152, 184, 190, 202, 230, 304, 368, 380, 404, 437, 460, 505, 529, 760, 808, 874, 920, 1010, 1058, 1520, 1616, 1748, 1840, 1919, 2020, 2116, 2185, 2323, 2645, 3496, 3838, 4040, 4232, 4370, 4646, 5290, 6992, 7676, 8080, 8464, 8740, 9292, 9595, 10051, 10580, 11615, 15352, 17480, 18584, 19190, 20102, 21160, 23230, 30704, 34960, 37168, 38380, 40204, 42320, 44137, 46460, 50255, 53429, 76760, 80408, 88274, 92920, 100510, 106858, 153520, 160816, 176548, 185840, 201020, 213716, 220685, 267145, 353096, 402040, 427432, 441370, 534290, 706192, 804080, 854864, 882740, 1015151, 1068580, 1765480, 2030302, 2137160, 3530960, 4060604, 4274320, 5075755, 8121208, 10151510, 16242416, 20303020, 40606040, 81212080]

約数ペア:

[(1, 81212080), (2, 40606040), (4, 20303020), (5, 16242416), (8, 10151510), (10, 8121208), (16, 5075755), (19, 4274320), (20, 4060604), (23, 3530960), (38, 2137160), (40, 2030302), (46, 1765480), (76, 1068580), (80, 1015151), (92, 882740), (95, 854864), (101, 804080), (115, 706192), (152, 534290), (184, 441370), (190, 427432), (202, 402040), (230, 353096), (304, 267145), (368, 220685), (380, 213716), (404, 201020), (437, 185840), (460, 176548), (505, 160816), (529, 153520), (760, 106858), (808, 100510), (874, 92920), (920, 88274), (1010, 80408), (1058, 76760), (1520, 53429), (1616, 50255), (1748, 46460), (1840, 44137), (1919, 42320), (2020, 40204), (2116, 38380), (2185, 37168), (2323, 34960), (2645, 30704), (3496, 23230), (3838, 21160), (4040, 20102), (4232, 19190), (4370, 18584), (4646, 17480), (5290, 15352), (6992, 11615), (7676, 10580), (8080, 10051), (8464, 9595), (8740, 9292)]