19801320

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{2143}}^1$

素因数の和:2175

約数の個数: 128

約数和(自身を含む): 74096640

約数和(自身を除く): 54295320

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 14, 15, 20, 21, 22, 24, 28, 30, 33, 35, 40, 42, 44, 55, 56, 60, 66, 70, 77, 84, 88, 105, 110, 120, 132, 140, 154, 165, 168, 210, 220, 231, 264, 280, 308, 330, 385, 420, 440, 462, 616, 660, 770, 840, 924, 1155, 1320, 1540, 1848, 2143, 2310, 3080, 4286, 4620, 6429, 8572, 9240, 10715, 12858, 15001, 17144, 21430, 23573, 25716, 30002, 32145, 42860, 45003, 47146, 51432, 60004, 64290, 70719, 75005, 85720, 90006, 94292, 117865, 120008, 128580, 141438, 150010, 165011, 180012, 188584, 225015, 235730, 257160, 282876, 300020, 330022, 353595, 360024, 450030, 471460, 495033, 565752, 600040, 660044, 707190, 825055, 900060, 942920, 990066, 1320088, 1414380, 1650110, 1800120, 1980132, 2475165, 2828760, 3300220, 3960264, 4950330, 6600440, 9900660, 19801320]

約数ペア:

[(1, 19801320), (2, 9900660), (3, 6600440), (4, 4950330), (5, 3960264), (6, 3300220), (7, 2828760), (8, 2475165), (10, 1980132), (11, 1800120), (12, 1650110), (14, 1414380), (15, 1320088), (20, 990066), (21, 942920), (22, 900060), (24, 825055), (28, 707190), (30, 660044), (33, 600040), (35, 565752), (40, 495033), (42, 471460), (44, 450030), (55, 360024), (56, 353595), (60, 330022), (66, 300020), (70, 282876), (77, 257160), (84, 235730), (88, 225015), (105, 188584), (110, 180012), (120, 165011), (132, 150010), (140, 141438), (154, 128580), (165, 120008), (168, 117865), (210, 94292), (220, 90006), (231, 85720), (264, 75005), (280, 70719), (308, 64290), (330, 60004), (385, 51432), (420, 47146), (440, 45003), (462, 42860), (616, 32145), (660, 30002), (770, 25716), (840, 23573), (924, 21430), (1155, 17144), (1320, 15001), (1540, 12858), (1848, 10715), (2143, 9240), (2310, 8572), (3080, 6429), (4286, 4620)]