20989440

素因数分解:

$2^9\times 3^2\times 5^1\times {\mathrm{911}}^1$

素因数の和:940

約数の個数: 120

約数和(自身を含む): 72772128

約数和(自身を除く): 51782688

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 64, 72, 80, 90, 96, 120, 128, 144, 160, 180, 192, 240, 256, 288, 320, 360, 384, 480, 512, 576, 640, 720, 768, 911, 960, 1152, 1280, 1440, 1536, 1822, 1920, 2304, 2560, 2733, 2880, 3644, 3840, 4555, 4608, 5466, 5760, 7288, 7680, 8199, 9110, 10932, 11520, 13665, 14576, 16398, 18220, 21864, 23040, 27330, 29152, 32796, 36440, 40995, 43728, 54660, 58304, 65592, 72880, 81990, 87456, 109320, 116608, 131184, 145760, 163980, 174912, 218640, 233216, 262368, 291520, 327960, 349824, 437280, 466432, 524736, 583040, 655920, 699648, 874560, 1049472, 1166080, 1311840, 1399296, 1749120, 2098944, 2332160, 2623680, 3498240, 4197888, 5247360, 6996480, 10494720, 20989440]

約数ペア:

[(1, 20989440), (2, 10494720), (3, 6996480), (4, 5247360), (5, 4197888), (6, 3498240), (8, 2623680), (9, 2332160), (10, 2098944), (12, 1749120), (15, 1399296), (16, 1311840), (18, 1166080), (20, 1049472), (24, 874560), (30, 699648), (32, 655920), (36, 583040), (40, 524736), (45, 466432), (48, 437280), (60, 349824), (64, 327960), (72, 291520), (80, 262368), (90, 233216), (96, 218640), (120, 174912), (128, 163980), (144, 145760), (160, 131184), (180, 116608), (192, 109320), (240, 87456), (256, 81990), (288, 72880), (320, 65592), (360, 58304), (384, 54660), (480, 43728), (512, 40995), (576, 36440), (640, 32796), (720, 29152), (768, 27330), (911, 23040), (960, 21864), (1152, 18220), (1280, 16398), (1440, 14576), (1536, 13665), (1822, 11520), (1920, 10932), (2304, 9110), (2560, 8199), (2733, 7680), (2880, 7288), (3644, 5760), (3840, 5466), (4555, 4608)]