20820800

素因数分解:

$2^6\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2$

素因数の和:66

約数の個数: 252

約数和(自身を含む): 69165216

約数和(自身を除く): 48344416

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 20, 22, 25, 26, 28, 32, 35, 40, 44, 50, 52, 55, 56, 64, 65, 70, 77, 80, 88, 91, 100, 104, 110, 112, 130, 140, 143, 154, 160, 169, 175, 176, 182, 200, 208, 220, 224, 260, 275, 280, 286, 308, 320, 325, 338, 350, 352, 364, 385, 400, 416, 440, 448, 455, 520, 550, 560, 572, 616, 650, 676, 700, 704, 715, 728, 770, 800, 832, 845, 880, 910, 1001, 1040, 1100, 1120, 1144, 1183, 1232, 1300, 1352, 1400, 1430, 1456, 1540, 1600, 1690, 1760, 1820, 1859, 1925, 2002, 2080, 2200, 2240, 2275, 2288, 2366, 2464, 2600, 2704, 2800, 2860, 2912, 3080, 3380, 3520, 3575, 3640, 3718, 3850, 4004, 4160, 4225, 4400, 4550, 4576, 4732, 4928, 5005, 5200, 5408, 5600, 5720, 5824, 5915, 6160, 6760, 7150, 7280, 7436, 7700, 8008, 8450, 8800, 9100, 9152, 9295, 9464, 10010, 10400, 10816, 11200, 11440, 11830, 12320, 13013, 13520, 14300, 14560, 14872, 15400, 16016, 16900, 17600, 18200, 18590, 18928, 20020, 20800, 22880, 23660, 24640, 25025, 26026, 27040, 28600, 29120, 29575, 29744, 30800, 32032, 33800, 36400, 37180, 37856, 40040, 45760, 46475, 47320, 50050, 52052, 54080, 57200, 59150, 59488, 61600, 64064, 65065, 67600, 72800, 74360, 75712, 80080, 92950, 94640, 100100, 104104, 114400, 118300, 118976, 123200, 130130, 135200, 145600, 148720, 160160, 185900, 189280, 200200, 208208, 228800, 236600, 260260, 270400, 297440, 320320, 325325, 371800, 378560, 400400, 416416, 473200, 520520, 594880, 650650, 743600, 800800, 832832, 946400, 1041040, 1301300, 1487200, 1601600, 1892800, 2082080, 2602600, 2974400, 4164160, 5205200, 10410400, 20820800]

約数ペア:

[(1, 20820800), (2, 10410400), (4, 5205200), (5, 4164160), (7, 2974400), (8, 2602600), (10, 2082080), (11, 1892800), (13, 1601600), (14, 1487200), (16, 1301300), (20, 1041040), (22, 946400), (25, 832832), (26, 800800), (28, 743600), (32, 650650), (35, 594880), (40, 520520), (44, 473200), (50, 416416), (52, 400400), (55, 378560), (56, 371800), (64, 325325), (65, 320320), (70, 297440), (77, 270400), (80, 260260), (88, 236600), (91, 228800), (100, 208208), (104, 200200), (110, 189280), (112, 185900), (130, 160160), (140, 148720), (143, 145600), (154, 135200), (160, 130130), (169, 123200), (175, 118976), (176, 118300), (182, 114400), (200, 104104), (208, 100100), (220, 94640), (224, 92950), (260, 80080), (275, 75712), (280, 74360), (286, 72800), (308, 67600), (320, 65065), (325, 64064), (338, 61600), (350, 59488), (352, 59150), (364, 57200), (385, 54080), (400, 52052), (416, 50050), (440, 47320), (448, 46475), (455, 45760), (520, 40040), (550, 37856), (560, 37180), (572, 36400), (616, 33800), (650, 32032), (676, 30800), (700, 29744), (704, 29575), (715, 29120), (728, 28600), (770, 27040), (800, 26026), (832, 25025), (845, 24640), (880, 23660), (910, 22880), (1001, 20800), (1040, 20020), (1100, 18928), (1120, 18590), (1144, 18200), (1183, 17600), (1232, 16900), (1300, 16016), (1352, 15400), (1400, 14872), (1430, 14560), (1456, 14300), (1540, 13520), (1600, 13013), (1690, 12320), (1760, 11830), (1820, 11440), (1859, 11200), (1925, 10816), (2002, 10400), (2080, 10010), (2200, 9464), (2240, 9295), (2275, 9152), (2288, 9100), (2366, 8800), (2464, 8450), (2600, 8008), (2704, 7700), (2800, 7436), (2860, 7280), (2912, 7150), (3080, 6760), (3380, 6160), (3520, 5915), (3575, 5824), (3640, 5720), (3718, 5600), (3850, 5408), (4004, 5200), (4160, 5005), (4225, 4928), (4400, 4732), (4550, 4576)]