18720720

素因数分解:

$2^4\times 3^7\times 5^1\times {\mathrm{107}}^1$

素因数の和:141

約数の個数: 160

約数和(自身を含む): 65888640

約数和(自身を除く): 47167920

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 36, 40, 45, 48, 54, 60, 72, 80, 81, 90, 107, 108, 120, 135, 144, 162, 180, 214, 216, 240, 243, 270, 321, 324, 360, 405, 428, 432, 486, 535, 540, 642, 648, 720, 729, 810, 856, 963, 972, 1070, 1080, 1215, 1284, 1296, 1458, 1605, 1620, 1712, 1926, 1944, 2140, 2160, 2187, 2430, 2568, 2889, 2916, 3210, 3240, 3645, 3852, 3888, 4280, 4374, 4815, 4860, 5136, 5778, 5832, 6420, 6480, 7290, 7704, 8560, 8667, 8748, 9630, 9720, 10935, 11556, 11664, 12840, 14445, 14580, 15408, 17334, 17496, 19260, 19440, 21870, 23112, 25680, 26001, 28890, 29160, 34668, 34992, 38520, 43335, 43740, 46224, 52002, 57780, 58320, 69336, 77040, 78003, 86670, 87480, 104004, 115560, 130005, 138672, 156006, 173340, 174960, 208008, 231120, 234009, 260010, 312012, 346680, 390015, 416016, 468018, 520020, 624024, 693360, 780030, 936036, 1040040, 1170045, 1248048, 1560060, 1872072, 2080080, 2340090, 3120120, 3744144, 4680180, 6240240, 9360360, 18720720]

約数ペア:

[(1, 18720720), (2, 9360360), (3, 6240240), (4, 4680180), (5, 3744144), (6, 3120120), (8, 2340090), (9, 2080080), (10, 1872072), (12, 1560060), (15, 1248048), (16, 1170045), (18, 1040040), (20, 936036), (24, 780030), (27, 693360), (30, 624024), (36, 520020), (40, 468018), (45, 416016), (48, 390015), (54, 346680), (60, 312012), (72, 260010), (80, 234009), (81, 231120), (90, 208008), (107, 174960), (108, 173340), (120, 156006), (135, 138672), (144, 130005), (162, 115560), (180, 104004), (214, 87480), (216, 86670), (240, 78003), (243, 77040), (270, 69336), (321, 58320), (324, 57780), (360, 52002), (405, 46224), (428, 43740), (432, 43335), (486, 38520), (535, 34992), (540, 34668), (642, 29160), (648, 28890), (720, 26001), (729, 25680), (810, 23112), (856, 21870), (963, 19440), (972, 19260), (1070, 17496), (1080, 17334), (1215, 15408), (1284, 14580), (1296, 14445), (1458, 12840), (1605, 11664), (1620, 11556), (1712, 10935), (1926, 9720), (1944, 9630), (2140, 8748), (2160, 8667), (2187, 8560), (2430, 7704), (2568, 7290), (2889, 6480), (2916, 6420), (3210, 5832), (3240, 5778), (3645, 5136), (3852, 4860), (3888, 4815), (4280, 4374)]