21246720

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{503}}^1$

素因数の和:538

約数の個数: 144

約数和(自身を含む): 74172672

約数和(自身を除く): 52925952

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 20, 22, 24, 30, 32, 33, 40, 44, 48, 55, 60, 64, 66, 80, 88, 96, 110, 120, 128, 132, 160, 165, 176, 192, 220, 240, 256, 264, 320, 330, 352, 384, 440, 480, 503, 528, 640, 660, 704, 768, 880, 960, 1006, 1056, 1280, 1320, 1408, 1509, 1760, 1920, 2012, 2112, 2515, 2640, 2816, 3018, 3520, 3840, 4024, 4224, 5030, 5280, 5533, 6036, 7040, 7545, 8048, 8448, 10060, 10560, 11066, 12072, 14080, 15090, 16096, 16599, 20120, 21120, 22132, 24144, 27665, 30180, 32192, 33198, 40240, 42240, 44264, 48288, 55330, 60360, 64384, 66396, 80480, 82995, 88528, 96576, 110660, 120720, 128768, 132792, 160960, 165990, 177056, 193152, 221320, 241440, 265584, 321920, 331980, 354112, 386304, 442640, 482880, 531168, 643840, 663960, 708224, 885280, 965760, 1062336, 1327920, 1416448, 1770560, 1931520, 2124672, 2655840, 3541120, 4249344, 5311680, 7082240, 10623360, 21246720]

約数ペア:

[(1, 21246720), (2, 10623360), (3, 7082240), (4, 5311680), (5, 4249344), (6, 3541120), (8, 2655840), (10, 2124672), (11, 1931520), (12, 1770560), (15, 1416448), (16, 1327920), (20, 1062336), (22, 965760), (24, 885280), (30, 708224), (32, 663960), (33, 643840), (40, 531168), (44, 482880), (48, 442640), (55, 386304), (60, 354112), (64, 331980), (66, 321920), (80, 265584), (88, 241440), (96, 221320), (110, 193152), (120, 177056), (128, 165990), (132, 160960), (160, 132792), (165, 128768), (176, 120720), (192, 110660), (220, 96576), (240, 88528), (256, 82995), (264, 80480), (320, 66396), (330, 64384), (352, 60360), (384, 55330), (440, 48288), (480, 44264), (503, 42240), (528, 40240), (640, 33198), (660, 32192), (704, 30180), (768, 27665), (880, 24144), (960, 22132), (1006, 21120), (1056, 20120), (1280, 16599), (1320, 16096), (1408, 15090), (1509, 14080), (1760, 12072), (1920, 11066), (2012, 10560), (2112, 10060), (2515, 8448), (2640, 8048), (2816, 7545), (3018, 7040), (3520, 6036), (3840, 5533), (4024, 5280), (4224, 5030)]