21280320

素因数分解:

$2^6\times 3^4\times 5^1\times {\mathrm{821}}^1$

素因数の和:850

約数の個数: 140

約数和(自身を含む): 75790044

約数和(自身を除く): 54509724

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 54, 60, 64, 72, 80, 81, 90, 96, 108, 120, 135, 144, 160, 162, 180, 192, 216, 240, 270, 288, 320, 324, 360, 405, 432, 480, 540, 576, 648, 720, 810, 821, 864, 960, 1080, 1296, 1440, 1620, 1642, 1728, 2160, 2463, 2592, 2880, 3240, 3284, 4105, 4320, 4926, 5184, 6480, 6568, 7389, 8210, 8640, 9852, 12315, 12960, 13136, 14778, 16420, 19704, 22167, 24630, 25920, 26272, 29556, 32840, 36945, 39408, 44334, 49260, 52544, 59112, 65680, 66501, 73890, 78816, 88668, 98520, 110835, 118224, 131360, 133002, 147780, 157632, 177336, 197040, 221670, 236448, 262720, 266004, 295560, 332505, 354672, 394080, 443340, 472896, 532008, 591120, 665010, 709344, 788160, 886680, 1064016, 1182240, 1330020, 1418688, 1773360, 2128032, 2364480, 2660040, 3546720, 4256064, 5320080, 7093440, 10640160, 21280320]

約数ペア:

[(1, 21280320), (2, 10640160), (3, 7093440), (4, 5320080), (5, 4256064), (6, 3546720), (8, 2660040), (9, 2364480), (10, 2128032), (12, 1773360), (15, 1418688), (16, 1330020), (18, 1182240), (20, 1064016), (24, 886680), (27, 788160), (30, 709344), (32, 665010), (36, 591120), (40, 532008), (45, 472896), (48, 443340), (54, 394080), (60, 354672), (64, 332505), (72, 295560), (80, 266004), (81, 262720), (90, 236448), (96, 221670), (108, 197040), (120, 177336), (135, 157632), (144, 147780), (160, 133002), (162, 131360), (180, 118224), (192, 110835), (216, 98520), (240, 88668), (270, 78816), (288, 73890), (320, 66501), (324, 65680), (360, 59112), (405, 52544), (432, 49260), (480, 44334), (540, 39408), (576, 36945), (648, 32840), (720, 29556), (810, 26272), (821, 25920), (864, 24630), (960, 22167), (1080, 19704), (1296, 16420), (1440, 14778), (1620, 13136), (1642, 12960), (1728, 12315), (2160, 9852), (2463, 8640), (2592, 8210), (2880, 7389), (3240, 6568), (3284, 6480), (4105, 5184), (4320, 4926)]