21086240

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{281}}^1$

素因数の和:370

約数の個数: 96

約数和(自身を含む): 57988224

約数和(自身を除く): 36901984

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 67, 70, 80, 112, 134, 140, 160, 224, 268, 280, 281, 335, 469, 536, 560, 562, 670, 938, 1072, 1120, 1124, 1340, 1405, 1876, 1967, 2144, 2248, 2345, 2680, 2810, 3752, 3934, 4496, 4690, 5360, 5620, 7504, 7868, 8992, 9380, 9835, 10720, 11240, 15008, 15736, 18760, 18827, 19670, 22480, 31472, 37520, 37654, 39340, 44960, 62944, 75040, 75308, 78680, 94135, 131789, 150616, 157360, 188270, 263578, 301232, 314720, 376540, 527156, 602464, 658945, 753080, 1054312, 1317890, 1506160, 2108624, 2635780, 3012320, 4217248, 5271560, 10543120, 21086240]

約数ペア:

[(1, 21086240), (2, 10543120), (4, 5271560), (5, 4217248), (7, 3012320), (8, 2635780), (10, 2108624), (14, 1506160), (16, 1317890), (20, 1054312), (28, 753080), (32, 658945), (35, 602464), (40, 527156), (56, 376540), (67, 314720), (70, 301232), (80, 263578), (112, 188270), (134, 157360), (140, 150616), (160, 131789), (224, 94135), (268, 78680), (280, 75308), (281, 75040), (335, 62944), (469, 44960), (536, 39340), (560, 37654), (562, 37520), (670, 31472), (938, 22480), (1072, 19670), (1120, 18827), (1124, 18760), (1340, 15736), (1405, 15008), (1876, 11240), (1967, 10720), (2144, 9835), (2248, 9380), (2345, 8992), (2680, 7868), (2810, 7504), (3752, 5620), (3934, 5360), (4496, 4690)]