19800720

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:214

約数の個数: 160

約数和(自身を含む): 69638400

約数和(自身を除く): 49837680

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, 89, 90, 103, 108, 120, 135, 144, 178, 180, 206, 216, 240, 267, 270, 309, 356, 360, 412, 432, 445, 515, 534, 540, 618, 712, 720, 801, 824, 890, 927, 1030, 1068, 1080, 1236, 1335, 1424, 1545, 1602, 1648, 1780, 1854, 2060, 2136, 2160, 2403, 2472, 2670, 2781, 3090, 3204, 3560, 3708, 4005, 4120, 4272, 4635, 4806, 4944, 5340, 5562, 6180, 6408, 7120, 7416, 8010, 8240, 9167, 9270, 9612, 10680, 11124, 12015, 12360, 12816, 13905, 14832, 16020, 18334, 18540, 19224, 21360, 22248, 24030, 24720, 27501, 27810, 32040, 36668, 37080, 38448, 44496, 45835, 48060, 55002, 55620, 64080, 73336, 74160, 82503, 91670, 96120, 110004, 111240, 137505, 146672, 165006, 183340, 192240, 220008, 222480, 247509, 275010, 330012, 366680, 412515, 440016, 495018, 550020, 660024, 733360, 825030, 990036, 1100040, 1237545, 1320048, 1650060, 1980072, 2200080, 2475090, 3300120, 3960144, 4950180, 6600240, 9900360, 19800720]

約数ペア:

[(1, 19800720), (2, 9900360), (3, 6600240), (4, 4950180), (5, 3960144), (6, 3300120), (8, 2475090), (9, 2200080), (10, 1980072), (12, 1650060), (15, 1320048), (16, 1237545), (18, 1100040), (20, 990036), (24, 825030), (27, 733360), (30, 660024), (36, 550020), (40, 495018), (45, 440016), (48, 412515), (54, 366680), (60, 330012), (72, 275010), (80, 247509), (89, 222480), (90, 220008), (103, 192240), (108, 183340), (120, 165006), (135, 146672), (144, 137505), (178, 111240), (180, 110004), (206, 96120), (216, 91670), (240, 82503), (267, 74160), (270, 73336), (309, 64080), (356, 55620), (360, 55002), (412, 48060), (432, 45835), (445, 44496), (515, 38448), (534, 37080), (540, 36668), (618, 32040), (712, 27810), (720, 27501), (801, 24720), (824, 24030), (890, 22248), (927, 21360), (1030, 19224), (1068, 18540), (1080, 18334), (1236, 16020), (1335, 14832), (1424, 13905), (1545, 12816), (1602, 12360), (1648, 12015), (1780, 11124), (1854, 10680), (2060, 9612), (2136, 9270), (2160, 9167), (2403, 8240), (2472, 8010), (2670, 7416), (2781, 7120), (3090, 6408), (3204, 6180), (3560, 5562), (3708, 5340), (4005, 4944), (4120, 4806), (4272, 4635)]