21028480

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{103}}^1$

素因数の和:162

約数の個数: 128

約数和(自身を含む): 57283200

約数和(自身を除く): 36254720

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 32, 40, 44, 55, 58, 64, 80, 88, 103, 110, 116, 128, 145, 160, 176, 206, 220, 232, 290, 319, 320, 352, 412, 440, 464, 515, 580, 638, 640, 704, 824, 880, 928, 1030, 1133, 1160, 1276, 1408, 1595, 1648, 1760, 1856, 2060, 2266, 2320, 2552, 2987, 3190, 3296, 3520, 3712, 4120, 4532, 4640, 5104, 5665, 5974, 6380, 6592, 7040, 8240, 9064, 9280, 10208, 11330, 11948, 12760, 13184, 14935, 16480, 18128, 18560, 20416, 22660, 23896, 25520, 29870, 32857, 32960, 36256, 40832, 45320, 47792, 51040, 59740, 65714, 65920, 72512, 90640, 95584, 102080, 119480, 131428, 145024, 164285, 181280, 191168, 204160, 238960, 262856, 328570, 362560, 382336, 477920, 525712, 657140, 725120, 955840, 1051424, 1314280, 1911680, 2102848, 2628560, 4205696, 5257120, 10514240, 21028480]

約数ペア:

[(1, 21028480), (2, 10514240), (4, 5257120), (5, 4205696), (8, 2628560), (10, 2102848), (11, 1911680), (16, 1314280), (20, 1051424), (22, 955840), (29, 725120), (32, 657140), (40, 525712), (44, 477920), (55, 382336), (58, 362560), (64, 328570), (80, 262856), (88, 238960), (103, 204160), (110, 191168), (116, 181280), (128, 164285), (145, 145024), (160, 131428), (176, 119480), (206, 102080), (220, 95584), (232, 90640), (290, 72512), (319, 65920), (320, 65714), (352, 59740), (412, 51040), (440, 47792), (464, 45320), (515, 40832), (580, 36256), (638, 32960), (640, 32857), (704, 29870), (824, 25520), (880, 23896), (928, 22660), (1030, 20416), (1133, 18560), (1160, 18128), (1276, 16480), (1408, 14935), (1595, 13184), (1648, 12760), (1760, 11948), (1856, 11330), (2060, 10208), (2266, 9280), (2320, 9064), (2552, 8240), (2987, 7040), (3190, 6592), (3296, 6380), (3520, 5974), (3712, 5665), (4120, 5104), (4532, 4640)]