1277986280

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1\times {\mathrm{1033}}^1$

素因数の和:1398

約数の個数: 64

約数和(自身を含む): 2911289040

約数和(自身を除く): 1633302760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 197, 314, 394, 628, 785, 788, 985, 1033, 1256, 1570, 1576, 1970, 2066, 3140, 3940, 4132, 5165, 6280, 7880, 8264, 10330, 20660, 30929, 41320, 61858, 123716, 154645, 162181, 203501, 247432, 309290, 324362, 407002, 618580, 648724, 810905, 814004, 1017505, 1237160, 1297448, 1621810, 1628008, 2035010, 3243620, 4070020, 6487240, 8140040, 31949657, 63899314, 127798628, 159748285, 255597256, 319496570, 638993140, 1277986280]

約数ペア:

[(1, 1277986280), (2, 638993140), (4, 319496570), (5, 255597256), (8, 159748285), (10, 127798628), (20, 63899314), (40, 31949657), (157, 8140040), (197, 6487240), (314, 4070020), (394, 3243620), (628, 2035010), (785, 1628008), (788, 1621810), (985, 1297448), (1033, 1237160), (1256, 1017505), (1570, 814004), (1576, 810905), (1970, 648724), (2066, 618580), (3140, 407002), (3940, 324362), (4132, 309290), (5165, 247432), (6280, 203501), (7880, 162181), (8264, 154645), (10330, 123716), (20660, 61858), (30929, 41320)]