19998000

素因数分解:

$2^4\times 3^2\times 5^3\times {\mathrm{11}}^1\times {\mathrm{101}}^1$

素因数の和:141

約数の個数: 240

約数和(自身を含む): 76950432

約数和(自身を除く): 56952432

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 25, 30, 33, 36, 40, 44, 45, 48, 50, 55, 60, 66, 72, 75, 80, 88, 90, 99, 100, 101, 110, 120, 125, 132, 144, 150, 165, 176, 180, 198, 200, 202, 220, 225, 240, 250, 264, 275, 300, 303, 330, 360, 375, 396, 400, 404, 440, 450, 495, 500, 505, 528, 550, 600, 606, 660, 720, 750, 792, 808, 825, 880, 900, 909, 990, 1000, 1010, 1100, 1111, 1125, 1200, 1212, 1320, 1375, 1500, 1515, 1584, 1616, 1650, 1800, 1818, 1980, 2000, 2020, 2200, 2222, 2250, 2424, 2475, 2525, 2640, 2750, 3000, 3030, 3300, 3333, 3600, 3636, 3960, 4040, 4125, 4400, 4444, 4500, 4545, 4848, 4950, 5050, 5500, 5555, 6000, 6060, 6600, 6666, 7272, 7575, 7920, 8080, 8250, 8888, 9000, 9090, 9900, 9999, 10100, 11000, 11110, 12120, 12375, 12625, 13200, 13332, 14544, 15150, 16500, 16665, 17776, 18000, 18180, 19800, 19998, 20200, 22000, 22220, 22725, 24240, 24750, 25250, 26664, 27775, 30300, 33000, 33330, 36360, 37875, 39600, 39996, 40400, 44440, 45450, 49500, 49995, 50500, 53328, 55550, 60600, 66000, 66660, 72720, 75750, 79992, 83325, 88880, 90900, 99000, 99990, 101000, 111100, 113625, 121200, 133320, 138875, 151500, 159984, 166650, 181800, 198000, 199980, 202000, 222200, 227250, 249975, 266640, 277750, 303000, 333300, 363600, 399960, 416625, 444400, 454500, 499950, 555500, 606000, 666600, 799920, 833250, 909000, 999900, 1111000, 1249875, 1333200, 1666500, 1818000, 1999800, 2222000, 2499750, 3333000, 3999600, 4999500, 6666000, 9999000, 19998000]

約数ペア:

[(1, 19998000), (2, 9999000), (3, 6666000), (4, 4999500), (5, 3999600), (6, 3333000), (8, 2499750), (9, 2222000), (10, 1999800), (11, 1818000), (12, 1666500), (15, 1333200), (16, 1249875), (18, 1111000), (20, 999900), (22, 909000), (24, 833250), (25, 799920), (30, 666600), (33, 606000), (36, 555500), (40, 499950), (44, 454500), (45, 444400), (48, 416625), (50, 399960), (55, 363600), (60, 333300), (66, 303000), (72, 277750), (75, 266640), (80, 249975), (88, 227250), (90, 222200), (99, 202000), (100, 199980), (101, 198000), (110, 181800), (120, 166650), (125, 159984), (132, 151500), (144, 138875), (150, 133320), (165, 121200), (176, 113625), (180, 111100), (198, 101000), (200, 99990), (202, 99000), (220, 90900), (225, 88880), (240, 83325), (250, 79992), (264, 75750), (275, 72720), (300, 66660), (303, 66000), (330, 60600), (360, 55550), (375, 53328), (396, 50500), (400, 49995), (404, 49500), (440, 45450), (450, 44440), (495, 40400), (500, 39996), (505, 39600), (528, 37875), (550, 36360), (600, 33330), (606, 33000), (660, 30300), (720, 27775), (750, 26664), (792, 25250), (808, 24750), (825, 24240), (880, 22725), (900, 22220), (909, 22000), (990, 20200), (1000, 19998), (1010, 19800), (1100, 18180), (1111, 18000), (1125, 17776), (1200, 16665), (1212, 16500), (1320, 15150), (1375, 14544), (1500, 13332), (1515, 13200), (1584, 12625), (1616, 12375), (1650, 12120), (1800, 11110), (1818, 11000), (1980, 10100), (2000, 9999), (2020, 9900), (2200, 9090), (2222, 9000), (2250, 8888), (2424, 8250), (2475, 8080), (2525, 7920), (2640, 7575), (2750, 7272), (3000, 6666), (3030, 6600), (3300, 6060), (3333, 6000), (3600, 5555), (3636, 5500), (3960, 5050), (4040, 4950), (4125, 4848), (4400, 4545), (4444, 4500)]