81051520

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{397}}^1$

素因数の和:456

約数の個数: 128

約数和(自身を含む): 219218400

約数和(自身を除く): 138166880

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 32, 40, 44, 55, 58, 64, 80, 88, 110, 116, 128, 145, 160, 176, 220, 232, 290, 319, 320, 352, 397, 440, 464, 580, 638, 640, 704, 794, 880, 928, 1160, 1276, 1408, 1588, 1595, 1760, 1856, 1985, 2320, 2552, 3176, 3190, 3520, 3712, 3970, 4367, 4640, 5104, 6352, 6380, 7040, 7940, 8734, 9280, 10208, 11513, 12704, 12760, 15880, 17468, 18560, 20416, 21835, 23026, 25408, 25520, 31760, 34936, 40832, 43670, 46052, 50816, 51040, 57565, 63520, 69872, 87340, 92104, 102080, 115130, 126643, 127040, 139744, 174680, 184208, 204160, 230260, 253286, 254080, 279488, 349360, 368416, 460520, 506572, 558976, 633215, 698720, 736832, 921040, 1013144, 1266430, 1397440, 1473664, 1842080, 2026288, 2532860, 2794880, 3684160, 4052576, 5065720, 7368320, 8105152, 10131440, 16210304, 20262880, 40525760, 81051520]

約数ペア:

[(1, 81051520), (2, 40525760), (4, 20262880), (5, 16210304), (8, 10131440), (10, 8105152), (11, 7368320), (16, 5065720), (20, 4052576), (22, 3684160), (29, 2794880), (32, 2532860), (40, 2026288), (44, 1842080), (55, 1473664), (58, 1397440), (64, 1266430), (80, 1013144), (88, 921040), (110, 736832), (116, 698720), (128, 633215), (145, 558976), (160, 506572), (176, 460520), (220, 368416), (232, 349360), (290, 279488), (319, 254080), (320, 253286), (352, 230260), (397, 204160), (440, 184208), (464, 174680), (580, 139744), (638, 127040), (640, 126643), (704, 115130), (794, 102080), (880, 92104), (928, 87340), (1160, 69872), (1276, 63520), (1408, 57565), (1588, 51040), (1595, 50816), (1760, 46052), (1856, 43670), (1985, 40832), (2320, 34936), (2552, 31760), (3176, 25520), (3190, 25408), (3520, 23026), (3712, 21835), (3970, 20416), (4367, 18560), (4640, 17468), (5104, 15880), (6352, 12760), (6380, 12704), (7040, 11513), (7940, 10208), (8734, 9280)]