20421720

素因数分解:

$2^3\times 3^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1$

素因数の和:228

約数の個数: 192

約数和(自身を含む): 75479040

約数和(自身を除く): 55057320

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 18, 20, 22, 24, 27, 30, 33, 36, 40, 44, 45, 54, 55, 60, 66, 72, 81, 88, 90, 99, 108, 110, 120, 132, 135, 162, 165, 180, 191, 198, 216, 220, 243, 264, 270, 297, 324, 330, 360, 382, 396, 405, 440, 486, 495, 540, 573, 594, 648, 660, 764, 792, 810, 891, 955, 972, 990, 1080, 1146, 1188, 1215, 1320, 1485, 1528, 1620, 1719, 1782, 1910, 1944, 1980, 2101, 2292, 2376, 2430, 2673, 2865, 2970, 3240, 3438, 3564, 3820, 3960, 4202, 4455, 4584, 4860, 5157, 5346, 5730, 5940, 6303, 6876, 7128, 7640, 8404, 8595, 8910, 9720, 10314, 10505, 10692, 11460, 11880, 12606, 13365, 13752, 15471, 16808, 17190, 17820, 18909, 20628, 21010, 21384, 22920, 25212, 25785, 26730, 30942, 31515, 34380, 35640, 37818, 41256, 42020, 46413, 50424, 51570, 53460, 56727, 61884, 63030, 68760, 75636, 77355, 84040, 92826, 94545, 103140, 106920, 113454, 123768, 126060, 151272, 154710, 170181, 185652, 189090, 206280, 226908, 232065, 252120, 283635, 309420, 340362, 371304, 378180, 453816, 464130, 510543, 567270, 618840, 680724, 756360, 850905, 928260, 1021086, 1134540, 1361448, 1701810, 1856520, 2042172, 2269080, 2552715, 3403620, 4084344, 5105430, 6807240, 10210860, 20421720]

約数ペア:

[(1, 20421720), (2, 10210860), (3, 6807240), (4, 5105430), (5, 4084344), (6, 3403620), (8, 2552715), (9, 2269080), (10, 2042172), (11, 1856520), (12, 1701810), (15, 1361448), (18, 1134540), (20, 1021086), (22, 928260), (24, 850905), (27, 756360), (30, 680724), (33, 618840), (36, 567270), (40, 510543), (44, 464130), (45, 453816), (54, 378180), (55, 371304), (60, 340362), (66, 309420), (72, 283635), (81, 252120), (88, 232065), (90, 226908), (99, 206280), (108, 189090), (110, 185652), (120, 170181), (132, 154710), (135, 151272), (162, 126060), (165, 123768), (180, 113454), (191, 106920), (198, 103140), (216, 94545), (220, 92826), (243, 84040), (264, 77355), (270, 75636), (297, 68760), (324, 63030), (330, 61884), (360, 56727), (382, 53460), (396, 51570), (405, 50424), (440, 46413), (486, 42020), (495, 41256), (540, 37818), (573, 35640), (594, 34380), (648, 31515), (660, 30942), (764, 26730), (792, 25785), (810, 25212), (891, 22920), (955, 21384), (972, 21010), (990, 20628), (1080, 18909), (1146, 17820), (1188, 17190), (1215, 16808), (1320, 15471), (1485, 13752), (1528, 13365), (1620, 12606), (1719, 11880), (1782, 11460), (1910, 10692), (1944, 10505), (1980, 10314), (2101, 9720), (2292, 8910), (2376, 8595), (2430, 8404), (2673, 7640), (2865, 7128), (2970, 6876), (3240, 6303), (3438, 5940), (3564, 5730), (3820, 5346), (3960, 5157), (4202, 4860), (4455, 4584)]