20781360

素因数分解:

$2^4\times 3^5\times 5^1\times {\mathrm{1069}}^1$

素因数の和:1097

約数の個数: 120

約数和(自身を含む): 72443280

約数和(自身を除く): 51661920

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 36, 40, 45, 48, 54, 60, 72, 80, 81, 90, 108, 120, 135, 144, 162, 180, 216, 240, 243, 270, 324, 360, 405, 432, 486, 540, 648, 720, 810, 972, 1069, 1080, 1215, 1296, 1620, 1944, 2138, 2160, 2430, 3207, 3240, 3888, 4276, 4860, 5345, 6414, 6480, 8552, 9621, 9720, 10690, 12828, 16035, 17104, 19242, 19440, 21380, 25656, 28863, 32070, 38484, 42760, 48105, 51312, 57726, 64140, 76968, 85520, 86589, 96210, 115452, 128280, 144315, 153936, 173178, 192420, 230904, 256560, 259767, 288630, 346356, 384840, 432945, 461808, 519534, 577260, 692712, 769680, 865890, 1039068, 1154520, 1298835, 1385424, 1731780, 2078136, 2309040, 2597670, 3463560, 4156272, 5195340, 6927120, 10390680, 20781360]

約数ペア:

[(1, 20781360), (2, 10390680), (3, 6927120), (4, 5195340), (5, 4156272), (6, 3463560), (8, 2597670), (9, 2309040), (10, 2078136), (12, 1731780), (15, 1385424), (16, 1298835), (18, 1154520), (20, 1039068), (24, 865890), (27, 769680), (30, 692712), (36, 577260), (40, 519534), (45, 461808), (48, 432945), (54, 384840), (60, 346356), (72, 288630), (80, 259767), (81, 256560), (90, 230904), (108, 192420), (120, 173178), (135, 153936), (144, 144315), (162, 128280), (180, 115452), (216, 96210), (240, 86589), (243, 85520), (270, 76968), (324, 64140), (360, 57726), (405, 51312), (432, 48105), (486, 42760), (540, 38484), (648, 32070), (720, 28863), (810, 25656), (972, 21380), (1069, 19440), (1080, 19242), (1215, 17104), (1296, 16035), (1620, 12828), (1944, 10690), (2138, 9720), (2160, 9621), (2430, 8552), (3207, 6480), (3240, 6414), (3888, 5345), (4276, 4860)]