820867480

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{197}}^1\times {\mathrm{1427}}^1$

素因数の和:1708

約数の個数: 64

約数和(自身を含む): 1883075040

約数和(自身を除く): 1062207560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 197, 292, 365, 394, 584, 730, 788, 985, 1427, 1460, 1576, 1970, 2854, 2920, 3940, 5708, 7135, 7880, 11416, 14270, 14381, 28540, 28762, 57080, 57524, 71905, 104171, 115048, 143810, 208342, 281119, 287620, 416684, 520855, 562238, 575240, 833368, 1041710, 1124476, 1405595, 2083420, 2248952, 2811190, 4166840, 5622380, 11244760, 20521687, 41043374, 82086748, 102608435, 164173496, 205216870, 410433740, 820867480]

約数ペア:

[(1, 820867480), (2, 410433740), (4, 205216870), (5, 164173496), (8, 102608435), (10, 82086748), (20, 41043374), (40, 20521687), (73, 11244760), (146, 5622380), (197, 4166840), (292, 2811190), (365, 2248952), (394, 2083420), (584, 1405595), (730, 1124476), (788, 1041710), (985, 833368), (1427, 575240), (1460, 562238), (1576, 520855), (1970, 416684), (2854, 287620), (2920, 281119), (3940, 208342), (5708, 143810), (7135, 115048), (7880, 104171), (11416, 71905), (14270, 57524), (14381, 57080), (28540, 28762)]