21980160

素因数分解:

$2^{10}\times 3^4\times 5^1\times {\mathrm{53}}^1$

素因数の和:90

約数の個数: 220

約数和(自身を含む): 80250588

約数和(自身を除く): 58270428

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 53, 54, 60, 64, 72, 80, 81, 90, 96, 106, 108, 120, 128, 135, 144, 159, 160, 162, 180, 192, 212, 216, 240, 256, 265, 270, 288, 318, 320, 324, 360, 384, 405, 424, 432, 477, 480, 512, 530, 540, 576, 636, 640, 648, 720, 768, 795, 810, 848, 864, 954, 960, 1024, 1060, 1080, 1152, 1272, 1280, 1296, 1431, 1440, 1536, 1590, 1620, 1696, 1728, 1908, 1920, 2120, 2160, 2304, 2385, 2544, 2560, 2592, 2862, 2880, 3072, 3180, 3240, 3392, 3456, 3816, 3840, 4240, 4293, 4320, 4608, 4770, 5088, 5120, 5184, 5724, 5760, 6360, 6480, 6784, 6912, 7155, 7632, 7680, 8480, 8586, 8640, 9216, 9540, 10176, 10368, 11448, 11520, 12720, 12960, 13568, 13824, 14310, 15264, 15360, 16960, 17172, 17280, 19080, 20352, 20736, 21465, 22896, 23040, 25440, 25920, 27136, 27648, 28620, 30528, 33920, 34344, 34560, 38160, 40704, 41472, 42930, 45792, 46080, 50880, 51840, 54272, 57240, 61056, 67840, 68688, 69120, 76320, 81408, 82944, 85860, 91584, 101760, 103680, 114480, 122112, 135680, 137376, 138240, 152640, 162816, 171720, 183168, 203520, 207360, 228960, 244224, 271360, 274752, 305280, 343440, 366336, 407040, 414720, 457920, 488448, 549504, 610560, 686880, 732672, 814080, 915840, 1099008, 1221120, 1373760, 1465344, 1831680, 2198016, 2442240, 2747520, 3663360, 4396032, 5495040, 7326720, 10990080, 21980160]

約数ペア:

[(1, 21980160), (2, 10990080), (3, 7326720), (4, 5495040), (5, 4396032), (6, 3663360), (8, 2747520), (9, 2442240), (10, 2198016), (12, 1831680), (15, 1465344), (16, 1373760), (18, 1221120), (20, 1099008), (24, 915840), (27, 814080), (30, 732672), (32, 686880), (36, 610560), (40, 549504), (45, 488448), (48, 457920), (53, 414720), (54, 407040), (60, 366336), (64, 343440), (72, 305280), (80, 274752), (81, 271360), (90, 244224), (96, 228960), (106, 207360), (108, 203520), (120, 183168), (128, 171720), (135, 162816), (144, 152640), (159, 138240), (160, 137376), (162, 135680), (180, 122112), (192, 114480), (212, 103680), (216, 101760), (240, 91584), (256, 85860), (265, 82944), (270, 81408), (288, 76320), (318, 69120), (320, 68688), (324, 67840), (360, 61056), (384, 57240), (405, 54272), (424, 51840), (432, 50880), (477, 46080), (480, 45792), (512, 42930), (530, 41472), (540, 40704), (576, 38160), (636, 34560), (640, 34344), (648, 33920), (720, 30528), (768, 28620), (795, 27648), (810, 27136), (848, 25920), (864, 25440), (954, 23040), (960, 22896), (1024, 21465), (1060, 20736), (1080, 20352), (1152, 19080), (1272, 17280), (1280, 17172), (1296, 16960), (1431, 15360), (1440, 15264), (1536, 14310), (1590, 13824), (1620, 13568), (1696, 12960), (1728, 12720), (1908, 11520), (1920, 11448), (2120, 10368), (2160, 10176), (2304, 9540), (2385, 9216), (2544, 8640), (2560, 8586), (2592, 8480), (2862, 7680), (2880, 7632), (3072, 7155), (3180, 6912), (3240, 6784), (3392, 6480), (3456, 6360), (3816, 5760), (3840, 5724), (4240, 5184), (4293, 5120), (4320, 5088), (4608, 4770)]