77721120

素因数分解:

$2^5\times 3^5\times 5^1\times {\mathrm{1999}}^1$

素因数の和:2029

約数の個数: 144

約数和(自身を含む): 275184000

約数和(自身を除く): 197462880

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 54, 60, 72, 80, 81, 90, 96, 108, 120, 135, 144, 160, 162, 180, 216, 240, 243, 270, 288, 324, 360, 405, 432, 480, 486, 540, 648, 720, 810, 864, 972, 1080, 1215, 1296, 1440, 1620, 1944, 1999, 2160, 2430, 2592, 3240, 3888, 3998, 4320, 4860, 5997, 6480, 7776, 7996, 9720, 9995, 11994, 12960, 15992, 17991, 19440, 19990, 23988, 29985, 31984, 35982, 38880, 39980, 47976, 53973, 59970, 63968, 71964, 79960, 89955, 95952, 107946, 119940, 143928, 159920, 161919, 179910, 191904, 215892, 239880, 269865, 287856, 319840, 323838, 359820, 431784, 479760, 485757, 539730, 575712, 647676, 719640, 809595, 863568, 959520, 971514, 1079460, 1295352, 1439280, 1619190, 1727136, 1943028, 2158920, 2428785, 2590704, 2878560, 3238380, 3886056, 4317840, 4857570, 5181408, 6476760, 7772112, 8635680, 9715140, 12953520, 15544224, 19430280, 25907040, 38860560, 77721120]

約数ペア:

[(1, 77721120), (2, 38860560), (3, 25907040), (4, 19430280), (5, 15544224), (6, 12953520), (8, 9715140), (9, 8635680), (10, 7772112), (12, 6476760), (15, 5181408), (16, 4857570), (18, 4317840), (20, 3886056), (24, 3238380), (27, 2878560), (30, 2590704), (32, 2428785), (36, 2158920), (40, 1943028), (45, 1727136), (48, 1619190), (54, 1439280), (60, 1295352), (72, 1079460), (80, 971514), (81, 959520), (90, 863568), (96, 809595), (108, 719640), (120, 647676), (135, 575712), (144, 539730), (160, 485757), (162, 479760), (180, 431784), (216, 359820), (240, 323838), (243, 319840), (270, 287856), (288, 269865), (324, 239880), (360, 215892), (405, 191904), (432, 179910), (480, 161919), (486, 159920), (540, 143928), (648, 119940), (720, 107946), (810, 95952), (864, 89955), (972, 79960), (1080, 71964), (1215, 63968), (1296, 59970), (1440, 53973), (1620, 47976), (1944, 39980), (1999, 38880), (2160, 35982), (2430, 31984), (2592, 29985), (3240, 23988), (3888, 19990), (3998, 19440), (4320, 17991), (4860, 15992), (5997, 12960), (6480, 11994), (7776, 9995), (7996, 9720)]