21271680

素因数分解:

$2^7\times 3^3\times 5^1\times {\mathrm{1231}}^1$

素因数の和:1259

約数の個数: 128

約数和(自身を含む): 75398400

約数和(自身を除く): 54126720

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, 90, 96, 108, 120, 128, 135, 144, 160, 180, 192, 216, 240, 270, 288, 320, 360, 384, 432, 480, 540, 576, 640, 720, 864, 960, 1080, 1152, 1231, 1440, 1728, 1920, 2160, 2462, 2880, 3456, 3693, 4320, 4924, 5760, 6155, 7386, 8640, 9848, 11079, 12310, 14772, 17280, 18465, 19696, 22158, 24620, 29544, 33237, 36930, 39392, 44316, 49240, 55395, 59088, 66474, 73860, 78784, 88632, 98480, 110790, 118176, 132948, 147720, 157568, 166185, 177264, 196960, 221580, 236352, 265896, 295440, 332370, 354528, 393920, 443160, 472704, 531792, 590880, 664740, 709056, 787840, 886320, 1063584, 1181760, 1329480, 1418112, 1772640, 2127168, 2363520, 2658960, 3545280, 4254336, 5317920, 7090560, 10635840, 21271680]

約数ペア:

[(1, 21271680), (2, 10635840), (3, 7090560), (4, 5317920), (5, 4254336), (6, 3545280), (8, 2658960), (9, 2363520), (10, 2127168), (12, 1772640), (15, 1418112), (16, 1329480), (18, 1181760), (20, 1063584), (24, 886320), (27, 787840), (30, 709056), (32, 664740), (36, 590880), (40, 531792), (45, 472704), (48, 443160), (54, 393920), (60, 354528), (64, 332370), (72, 295440), (80, 265896), (90, 236352), (96, 221580), (108, 196960), (120, 177264), (128, 166185), (135, 157568), (144, 147720), (160, 132948), (180, 118176), (192, 110790), (216, 98480), (240, 88632), (270, 78784), (288, 73860), (320, 66474), (360, 59088), (384, 55395), (432, 49240), (480, 44316), (540, 39392), (576, 36930), (640, 33237), (720, 29544), (864, 24620), (960, 22158), (1080, 19696), (1152, 18465), (1231, 17280), (1440, 14772), (1728, 12310), (1920, 11079), (2160, 9848), (2462, 8640), (2880, 7386), (3456, 6155), (3693, 5760), (4320, 4924)]