20715528960

素因数分解:

$2^8\times 3^2\times 5^1\times 7^1\times {\mathrm{256889}}^1$

素因数の和:256923

約数の個数: 216

約数和(自身を含む): 81912972960

約数和(自身を除く): 61197444000

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 56, 60, 63, 64, 70, 72, 80, 84, 90, 96, 105, 112, 120, 126, 128, 140, 144, 160, 168, 180, 192, 210, 224, 240, 252, 256, 280, 288, 315, 320, 336, 360, 384, 420, 448, 480, 504, 560, 576, 630, 640, 672, 720, 768, 840, 896, 960, 1008, 1120, 1152, 1260, 1280, 1344, 1440, 1680, 1792, 1920, 2016, 2240, 2304, 2520, 2688, 2880, 3360, 3840, 4032, 4480, 5040, 5376, 5760, 6720, 8064, 8960, 10080, 11520, 13440, 16128, 20160, 26880, 40320, 80640, 256889, 513778, 770667, 1027556, 1284445, 1541334, 1798223, 2055112, 2312001, 2568890, 3082668, 3596446, 3853335, 4110224, 4624002, 5137780, 5394669, 6165336, 7192892, 7706670, 8220448, 8991115, 9248004, 10275560, 10789338, 11560005, 12330672, 14385784, 15413340, 16184007, 16440896, 17982230, 18496008, 20551120, 21578676, 23120010, 24661344, 26973345, 28771568, 30826680, 32368014, 32881792, 35964460, 36992016, 41102240, 43157352, 46240020, 49322688, 53946690, 57543136, 61653360, 64736028, 65763584, 71928920, 73984032, 80920035, 82204480, 86314704, 92480040, 98645376, 107893380, 115086272, 123306720, 129472056, 143857840, 147968064, 161840070, 164408960, 172629408, 184960080, 197290752, 215786760, 230172544, 246613440, 258944112, 287715680, 295936128, 323680140, 328817920, 345258816, 369920160, 431573520, 460345088, 493226880, 517888224, 575431360, 591872256, 647360280, 690517632, 739840320, 863147040, 986453760, 1035776448, 1150862720, 1294720560, 1381035264, 1479680640, 1726294080, 2071552896, 2301725440, 2589441120, 2959361280, 3452588160, 4143105792, 5178882240, 6905176320, 10357764480, 20715528960]

約数ペア:

[(1, 20715528960), (2, 10357764480), (3, 6905176320), (4, 5178882240), (5, 4143105792), (6, 3452588160), (7, 2959361280), (8, 2589441120), (9, 2301725440), (10, 2071552896), (12, 1726294080), (14, 1479680640), (15, 1381035264), (16, 1294720560), (18, 1150862720), (20, 1035776448), (21, 986453760), (24, 863147040), (28, 739840320), (30, 690517632), (32, 647360280), (35, 591872256), (36, 575431360), (40, 517888224), (42, 493226880), (45, 460345088), (48, 431573520), (56, 369920160), (60, 345258816), (63, 328817920), (64, 323680140), (70, 295936128), (72, 287715680), (80, 258944112), (84, 246613440), (90, 230172544), (96, 215786760), (105, 197290752), (112, 184960080), (120, 172629408), (126, 164408960), (128, 161840070), (140, 147968064), (144, 143857840), (160, 129472056), (168, 123306720), (180, 115086272), (192, 107893380), (210, 98645376), (224, 92480040), (240, 86314704), (252, 82204480), (256, 80920035), (280, 73984032), (288, 71928920), (315, 65763584), (320, 64736028), (336, 61653360), (360, 57543136), (384, 53946690), (420, 49322688), (448, 46240020), (480, 43157352), (504, 41102240), (560, 36992016), (576, 35964460), (630, 32881792), (640, 32368014), (672, 30826680), (720, 28771568), (768, 26973345), (840, 24661344), (896, 23120010), (960, 21578676), (1008, 20551120), (1120, 18496008), (1152, 17982230), (1260, 16440896), (1280, 16184007), (1344, 15413340), (1440, 14385784), (1680, 12330672), (1792, 11560005), (1920, 10789338), (2016, 10275560), (2240, 9248004), (2304, 8991115), (2520, 8220448), (2688, 7706670), (2880, 7192892), (3360, 6165336), (3840, 5394669), (4032, 5137780), (4480, 4624002), (5040, 4110224), (5376, 3853335), (5760, 3596446), (6720, 3082668), (8064, 2568890), (8960, 2312001), (10080, 2055112), (11520, 1798223), (13440, 1541334), (16128, 1284445), (20160, 1027556), (26880, 770667), (40320, 513778), (80640, 256889)]