20856960

素因数分解:

$2^7\times 3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1$

素因数の和:116

約数の個数: 256

約数和(自身を含む): 79315200

約数和(自身を除く): 58458240

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 17, 18, 20, 24, 27, 30, 32, 34, 36, 40, 45, 48, 51, 54, 60, 64, 68, 71, 72, 80, 85, 90, 96, 102, 108, 120, 128, 135, 136, 142, 144, 153, 160, 170, 180, 192, 204, 213, 216, 240, 255, 270, 272, 284, 288, 306, 320, 340, 355, 360, 384, 408, 426, 432, 459, 480, 510, 540, 544, 568, 576, 612, 639, 640, 680, 710, 720, 765, 816, 852, 864, 918, 960, 1020, 1065, 1080, 1088, 1136, 1152, 1207, 1224, 1278, 1360, 1420, 1440, 1530, 1632, 1704, 1728, 1836, 1917, 1920, 2040, 2130, 2160, 2176, 2272, 2295, 2414, 2448, 2556, 2720, 2840, 2880, 3060, 3195, 3264, 3408, 3456, 3621, 3672, 3834, 4080, 4260, 4320, 4544, 4590, 4828, 4896, 5112, 5440, 5680, 5760, 6035, 6120, 6390, 6528, 6816, 7242, 7344, 7668, 8160, 8520, 8640, 9088, 9180, 9585, 9656, 9792, 10224, 10863, 10880, 11360, 12070, 12240, 12780, 13632, 14484, 14688, 15336, 16320, 17040, 17280, 18105, 18360, 19170, 19312, 19584, 20448, 21726, 22720, 24140, 24480, 25560, 27264, 28968, 29376, 30672, 32589, 32640, 34080, 36210, 36720, 38340, 38624, 40896, 43452, 45440, 48280, 48960, 51120, 54315, 57936, 58752, 61344, 65178, 68160, 72420, 73440, 76680, 77248, 81792, 86904, 96560, 97920, 102240, 108630, 115872, 122688, 130356, 136320, 144840, 146880, 153360, 154496, 162945, 173808, 193120, 204480, 217260, 231744, 245376, 260712, 289680, 293760, 306720, 325890, 347616, 386240, 408960, 434520, 463488, 521424, 579360, 613440, 651780, 695232, 772480, 869040, 1042848, 1158720, 1226880, 1303560, 1390464, 1738080, 2085696, 2317440, 2607120, 3476160, 4171392, 5214240, 6952320, 10428480, 20856960]

約数ペア:

[(1, 20856960), (2, 10428480), (3, 6952320), (4, 5214240), (5, 4171392), (6, 3476160), (8, 2607120), (9, 2317440), (10, 2085696), (12, 1738080), (15, 1390464), (16, 1303560), (17, 1226880), (18, 1158720), (20, 1042848), (24, 869040), (27, 772480), (30, 695232), (32, 651780), (34, 613440), (36, 579360), (40, 521424), (45, 463488), (48, 434520), (51, 408960), (54, 386240), (60, 347616), (64, 325890), (68, 306720), (71, 293760), (72, 289680), (80, 260712), (85, 245376), (90, 231744), (96, 217260), (102, 204480), (108, 193120), (120, 173808), (128, 162945), (135, 154496), (136, 153360), (142, 146880), (144, 144840), (153, 136320), (160, 130356), (170, 122688), (180, 115872), (192, 108630), (204, 102240), (213, 97920), (216, 96560), (240, 86904), (255, 81792), (270, 77248), (272, 76680), (284, 73440), (288, 72420), (306, 68160), (320, 65178), (340, 61344), (355, 58752), (360, 57936), (384, 54315), (408, 51120), (426, 48960), (432, 48280), (459, 45440), (480, 43452), (510, 40896), (540, 38624), (544, 38340), (568, 36720), (576, 36210), (612, 34080), (639, 32640), (640, 32589), (680, 30672), (710, 29376), (720, 28968), (765, 27264), (816, 25560), (852, 24480), (864, 24140), (918, 22720), (960, 21726), (1020, 20448), (1065, 19584), (1080, 19312), (1088, 19170), (1136, 18360), (1152, 18105), (1207, 17280), (1224, 17040), (1278, 16320), (1360, 15336), (1420, 14688), (1440, 14484), (1530, 13632), (1632, 12780), (1704, 12240), (1728, 12070), (1836, 11360), (1917, 10880), (1920, 10863), (2040, 10224), (2130, 9792), (2160, 9656), (2176, 9585), (2272, 9180), (2295, 9088), (2414, 8640), (2448, 8520), (2556, 8160), (2720, 7668), (2840, 7344), (2880, 7242), (3060, 6816), (3195, 6528), (3264, 6390), (3408, 6120), (3456, 6035), (3621, 5760), (3672, 5680), (3834, 5440), (4080, 5112), (4260, 4896), (4320, 4828), (4544, 4590)]