256737520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{5741}}^1$

素因数の和:5810

約数の個数: 80

約数和(自身を含む): 657895392

約数和(自身を除く): 401157872

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 43, 52, 65, 80, 86, 104, 130, 172, 208, 215, 260, 344, 430, 520, 559, 688, 860, 1040, 1118, 1720, 2236, 2795, 3440, 4472, 5590, 5741, 8944, 11180, 11482, 22360, 22964, 28705, 44720, 45928, 57410, 74633, 91856, 114820, 149266, 229640, 246863, 298532, 373165, 459280, 493726, 597064, 746330, 987452, 1194128, 1234315, 1492660, 1974904, 2468630, 2985320, 3209219, 3949808, 4937260, 5970640, 6418438, 9874520, 12836876, 16046095, 19749040, 25673752, 32092190, 51347504, 64184380, 128368760, 256737520]

約数ペア:

[(1, 256737520), (2, 128368760), (4, 64184380), (5, 51347504), (8, 32092190), (10, 25673752), (13, 19749040), (16, 16046095), (20, 12836876), (26, 9874520), (40, 6418438), (43, 5970640), (52, 4937260), (65, 3949808), (80, 3209219), (86, 2985320), (104, 2468630), (130, 1974904), (172, 1492660), (208, 1234315), (215, 1194128), (260, 987452), (344, 746330), (430, 597064), (520, 493726), (559, 459280), (688, 373165), (860, 298532), (1040, 246863), (1118, 229640), (1720, 149266), (2236, 114820), (2795, 91856), (3440, 74633), (4472, 57410), (5590, 45928), (5741, 44720), (8944, 28705), (11180, 22964), (11482, 22360)]