19800900

素因数分解:

$2^2\times 3^2\times 5^2\times 7^2\times {\mathrm{449}}^1$

素因数の和:483

約数の個数: 162

約数和(自身を含む): 72358650

約数和(自身を除く): 52557750

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 25, 28, 30, 35, 36, 42, 45, 49, 50, 60, 63, 70, 75, 84, 90, 98, 100, 105, 126, 140, 147, 150, 175, 180, 196, 210, 225, 245, 252, 294, 300, 315, 350, 420, 441, 449, 450, 490, 525, 588, 630, 700, 735, 882, 898, 900, 980, 1050, 1225, 1260, 1347, 1470, 1575, 1764, 1796, 2100, 2205, 2245, 2450, 2694, 2940, 3143, 3150, 3675, 4041, 4410, 4490, 4900, 5388, 6286, 6300, 6735, 7350, 8082, 8820, 8980, 9429, 11025, 11225, 12572, 13470, 14700, 15715, 16164, 18858, 20205, 22001, 22050, 22450, 26940, 28287, 31430, 33675, 37716, 40410, 44002, 44100, 44900, 47145, 56574, 62860, 66003, 67350, 78575, 80820, 88004, 94290, 101025, 110005, 113148, 132006, 134700, 141435, 157150, 188580, 198009, 202050, 220010, 235725, 264012, 282870, 314300, 330015, 396018, 404100, 440020, 471450, 550025, 565740, 660030, 707175, 792036, 942900, 990045, 1100050, 1320060, 1414350, 1650075, 1980090, 2200100, 2828700, 3300150, 3960180, 4950225, 6600300, 9900450, 19800900]

約数ペア:

[(1, 19800900), (2, 9900450), (3, 6600300), (4, 4950225), (5, 3960180), (6, 3300150), (7, 2828700), (9, 2200100), (10, 1980090), (12, 1650075), (14, 1414350), (15, 1320060), (18, 1100050), (20, 990045), (21, 942900), (25, 792036), (28, 707175), (30, 660030), (35, 565740), (36, 550025), (42, 471450), (45, 440020), (49, 404100), (50, 396018), (60, 330015), (63, 314300), (70, 282870), (75, 264012), (84, 235725), (90, 220010), (98, 202050), (100, 198009), (105, 188580), (126, 157150), (140, 141435), (147, 134700), (150, 132006), (175, 113148), (180, 110005), (196, 101025), (210, 94290), (225, 88004), (245, 80820), (252, 78575), (294, 67350), (300, 66003), (315, 62860), (350, 56574), (420, 47145), (441, 44900), (449, 44100), (450, 44002), (490, 40410), (525, 37716), (588, 33675), (630, 31430), (700, 28287), (735, 26940), (882, 22450), (898, 22050), (900, 22001), (980, 20205), (1050, 18858), (1225, 16164), (1260, 15715), (1347, 14700), (1470, 13470), (1575, 12572), (1764, 11225), (1796, 11025), (2100, 9429), (2205, 8980), (2245, 8820), (2450, 8082), (2694, 7350), (2940, 6735), (3143, 6300), (3150, 6286), (3675, 5388), (4041, 4900), (4410, 4490)]