55550000

素因数分解:

$2^4\times 5^5\times {\mathrm{11}}^1\times {\mathrm{101}}^1$

素因数の和:145

約数の個数: 120

約数和(自身を含む): 148209264

約数和(自身を除く): 92659264

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 40, 44, 50, 55, 80, 88, 100, 101, 110, 125, 176, 200, 202, 220, 250, 275, 400, 404, 440, 500, 505, 550, 625, 808, 880, 1000, 1010, 1100, 1111, 1250, 1375, 1616, 2000, 2020, 2200, 2222, 2500, 2525, 2750, 3125, 4040, 4400, 4444, 5000, 5050, 5500, 5555, 6250, 6875, 8080, 8888, 10000, 10100, 11000, 11110, 12500, 12625, 13750, 17776, 20200, 22000, 22220, 25000, 25250, 27500, 27775, 34375, 40400, 44440, 50000, 50500, 55000, 55550, 63125, 68750, 88880, 101000, 110000, 111100, 126250, 137500, 138875, 202000, 222200, 252500, 275000, 277750, 315625, 444400, 505000, 550000, 555500, 631250, 694375, 1010000, 1111000, 1262500, 1388750, 2222000, 2525000, 2777500, 3471875, 5050000, 5555000, 6943750, 11110000, 13887500, 27775000, 55550000]

約数ペア:

[(1, 55550000), (2, 27775000), (4, 13887500), (5, 11110000), (8, 6943750), (10, 5555000), (11, 5050000), (16, 3471875), (20, 2777500), (22, 2525000), (25, 2222000), (40, 1388750), (44, 1262500), (50, 1111000), (55, 1010000), (80, 694375), (88, 631250), (100, 555500), (101, 550000), (110, 505000), (125, 444400), (176, 315625), (200, 277750), (202, 275000), (220, 252500), (250, 222200), (275, 202000), (400, 138875), (404, 137500), (440, 126250), (500, 111100), (505, 110000), (550, 101000), (625, 88880), (808, 68750), (880, 63125), (1000, 55550), (1010, 55000), (1100, 50500), (1111, 50000), (1250, 44440), (1375, 40400), (1616, 34375), (2000, 27775), (2020, 27500), (2200, 25250), (2222, 25000), (2500, 22220), (2525, 22000), (2750, 20200), (3125, 17776), (4040, 13750), (4400, 12625), (4444, 12500), (5000, 11110), (5050, 11000), (5500, 10100), (5555, 10000), (6250, 8888), (6875, 8080)]