21056640

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{997}}^1$

素因数の和:1030

約数の個数: 128

約数和(自身を含む): 73293120

約数和(自身を除く): 52236480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 20, 22, 24, 30, 32, 33, 40, 44, 48, 55, 60, 64, 66, 80, 88, 96, 110, 120, 128, 132, 160, 165, 176, 192, 220, 240, 264, 320, 330, 352, 384, 440, 480, 528, 640, 660, 704, 880, 960, 997, 1056, 1320, 1408, 1760, 1920, 1994, 2112, 2640, 2991, 3520, 3988, 4224, 4985, 5280, 5982, 7040, 7976, 9970, 10560, 10967, 11964, 14955, 15952, 19940, 21120, 21934, 23928, 29910, 31904, 32901, 39880, 43868, 47856, 54835, 59820, 63808, 65802, 79760, 87736, 95712, 109670, 119640, 127616, 131604, 159520, 164505, 175472, 191424, 219340, 239280, 263208, 319040, 329010, 350944, 382848, 438680, 478560, 526416, 638080, 658020, 701888, 877360, 957120, 1052832, 1316040, 1403776, 1754720, 1914240, 2105664, 2632080, 3509440, 4211328, 5264160, 7018880, 10528320, 21056640]

約数ペア:

[(1, 21056640), (2, 10528320), (3, 7018880), (4, 5264160), (5, 4211328), (6, 3509440), (8, 2632080), (10, 2105664), (11, 1914240), (12, 1754720), (15, 1403776), (16, 1316040), (20, 1052832), (22, 957120), (24, 877360), (30, 701888), (32, 658020), (33, 638080), (40, 526416), (44, 478560), (48, 438680), (55, 382848), (60, 350944), (64, 329010), (66, 319040), (80, 263208), (88, 239280), (96, 219340), (110, 191424), (120, 175472), (128, 164505), (132, 159520), (160, 131604), (165, 127616), (176, 119640), (192, 109670), (220, 95712), (240, 87736), (264, 79760), (320, 65802), (330, 63808), (352, 59820), (384, 54835), (440, 47856), (480, 43868), (528, 39880), (640, 32901), (660, 31904), (704, 29910), (880, 23928), (960, 21934), (997, 21120), (1056, 19940), (1320, 15952), (1408, 14955), (1760, 11964), (1920, 10967), (1994, 10560), (2112, 9970), (2640, 7976), (2991, 7040), (3520, 5982), (3988, 5280), (4224, 4985)]