399997440

素因数分解:

$2^9\times 3^5\times 5^1\times {\mathrm{643}}^1$

素因数の和:681

約数の個数: 240

約数和(自身を含む): 1438845408

約数和(自身を除く): 1038847968

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, 54, 60, 64, 72, 80, 81, 90, 96, 108, 120, 128, 135, 144, 160, 162, 180, 192, 216, 240, 243, 256, 270, 288, 320, 324, 360, 384, 405, 432, 480, 486, 512, 540, 576, 640, 643, 648, 720, 768, 810, 864, 960, 972, 1080, 1152, 1215, 1280, 1286, 1296, 1440, 1536, 1620, 1728, 1920, 1929, 1944, 2160, 2304, 2430, 2560, 2572, 2592, 2880, 3215, 3240, 3456, 3840, 3858, 3888, 4320, 4608, 4860, 5144, 5184, 5760, 5787, 6430, 6480, 6912, 7680, 7716, 7776, 8640, 9645, 9720, 10288, 10368, 11520, 11574, 12860, 12960, 13824, 15432, 15552, 17280, 17361, 19290, 19440, 20576, 20736, 23040, 23148, 25720, 25920, 28935, 30864, 31104, 34560, 34722, 38580, 38880, 41152, 41472, 46296, 51440, 51840, 52083, 57870, 61728, 62208, 69120, 69444, 77160, 77760, 82304, 86805, 92592, 102880, 103680, 104166, 115740, 123456, 124416, 138888, 154320, 155520, 156249, 164608, 173610, 185184, 205760, 207360, 208332, 231480, 246912, 260415, 277776, 308640, 311040, 312498, 329216, 347220, 370368, 411520, 416664, 462960, 493824, 520830, 555552, 617280, 622080, 624996, 694440, 740736, 781245, 823040, 833328, 925920, 987648, 1041660, 1111104, 1234560, 1249992, 1388880, 1481472, 1562490, 1646080, 1666656, 1851840, 2083320, 2222208, 2469120, 2499984, 2777760, 2962944, 3124980, 3333312, 3703680, 4166640, 4444416, 4938240, 4999968, 5555520, 6249960, 6666624, 7407360, 8333280, 8888832, 9999936, 11111040, 12499920, 13333248, 14814720, 16666560, 19999872, 22222080, 24999840, 26666496, 33333120, 39999744, 44444160, 49999680, 66666240, 79999488, 99999360, 133332480, 199998720, 399997440]

約数ペア:

[(1, 399997440), (2, 199998720), (3, 133332480), (4, 99999360), (5, 79999488), (6, 66666240), (8, 49999680), (9, 44444160), (10, 39999744), (12, 33333120), (15, 26666496), (16, 24999840), (18, 22222080), (20, 19999872), (24, 16666560), (27, 14814720), (30, 13333248), (32, 12499920), (36, 11111040), (40, 9999936), (45, 8888832), (48, 8333280), (54, 7407360), (60, 6666624), (64, 6249960), (72, 5555520), (80, 4999968), (81, 4938240), (90, 4444416), (96, 4166640), (108, 3703680), (120, 3333312), (128, 3124980), (135, 2962944), (144, 2777760), (160, 2499984), (162, 2469120), (180, 2222208), (192, 2083320), (216, 1851840), (240, 1666656), (243, 1646080), (256, 1562490), (270, 1481472), (288, 1388880), (320, 1249992), (324, 1234560), (360, 1111104), (384, 1041660), (405, 987648), (432, 925920), (480, 833328), (486, 823040), (512, 781245), (540, 740736), (576, 694440), (640, 624996), (643, 622080), (648, 617280), (720, 555552), (768, 520830), (810, 493824), (864, 462960), (960, 416664), (972, 411520), (1080, 370368), (1152, 347220), (1215, 329216), (1280, 312498), (1286, 311040), (1296, 308640), (1440, 277776), (1536, 260415), (1620, 246912), (1728, 231480), (1920, 208332), (1929, 207360), (1944, 205760), (2160, 185184), (2304, 173610), (2430, 164608), (2560, 156249), (2572, 155520), (2592, 154320), (2880, 138888), (3215, 124416), (3240, 123456), (3456, 115740), (3840, 104166), (3858, 103680), (3888, 102880), (4320, 92592), (4608, 86805), (4860, 82304), (5144, 77760), (5184, 77160), (5760, 69444), (5787, 69120), (6430, 62208), (6480, 61728), (6912, 57870), (7680, 52083), (7716, 51840), (7776, 51440), (8640, 46296), (9645, 41472), (9720, 41152), (10288, 38880), (10368, 38580), (11520, 34722), (11574, 34560), (12860, 31104), (12960, 30864), (13824, 28935), (15432, 25920), (15552, 25720), (17280, 23148), (17361, 23040), (19290, 20736), (19440, 20576)]