256800280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{281}}^1$

素因数の和:401

約数の個数: 128

約数和(自身を含む): 662722560

約数和(自身を除く): 405922280

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 31, 40, 44, 55, 62, 67, 88, 110, 124, 134, 155, 220, 248, 268, 281, 310, 335, 341, 440, 536, 562, 620, 670, 682, 737, 1124, 1240, 1340, 1364, 1405, 1474, 1705, 2077, 2248, 2680, 2728, 2810, 2948, 3091, 3410, 3685, 4154, 5620, 5896, 6182, 6820, 7370, 8308, 8711, 10385, 11240, 12364, 13640, 14740, 15455, 16616, 17422, 18827, 20770, 22847, 24728, 29480, 30910, 34844, 37654, 41540, 43555, 45694, 61820, 69688, 75308, 83080, 87110, 91388, 94135, 95821, 114235, 123640, 150616, 174220, 182776, 188270, 191642, 207097, 228470, 348440, 376540, 383284, 414194, 456940, 479105, 583637, 753080, 766568, 828388, 913880, 958210, 1035485, 1167274, 1656776, 1916420, 2070970, 2334548, 2918185, 3832840, 4141940, 4669096, 5836370, 6420007, 8283880, 11672740, 12840014, 23345480, 25680028, 32100035, 51360056, 64200070, 128400140, 256800280]

約数ペア:

[(1, 256800280), (2, 128400140), (4, 64200070), (5, 51360056), (8, 32100035), (10, 25680028), (11, 23345480), (20, 12840014), (22, 11672740), (31, 8283880), (40, 6420007), (44, 5836370), (55, 4669096), (62, 4141940), (67, 3832840), (88, 2918185), (110, 2334548), (124, 2070970), (134, 1916420), (155, 1656776), (220, 1167274), (248, 1035485), (268, 958210), (281, 913880), (310, 828388), (335, 766568), (341, 753080), (440, 583637), (536, 479105), (562, 456940), (620, 414194), (670, 383284), (682, 376540), (737, 348440), (1124, 228470), (1240, 207097), (1340, 191642), (1364, 188270), (1405, 182776), (1474, 174220), (1705, 150616), (2077, 123640), (2248, 114235), (2680, 95821), (2728, 94135), (2810, 91388), (2948, 87110), (3091, 83080), (3410, 75308), (3685, 69688), (4154, 61820), (5620, 45694), (5896, 43555), (6182, 41540), (6820, 37654), (7370, 34844), (8308, 30910), (8711, 29480), (10385, 24728), (11240, 22847), (12364, 20770), (13640, 18827), (14740, 17422), (15455, 16616)]