820538520

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{97}}^1\times {\mathrm{157}}^1\times {\mathrm{449}}^1$

素因数の和:717

約数の個数: 128

約数和(自身を含む): 2508408000

約数和(自身を除く): 1687869480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 97, 120, 157, 194, 291, 314, 388, 449, 471, 485, 582, 628, 776, 785, 898, 942, 970, 1164, 1256, 1347, 1455, 1570, 1796, 1884, 1940, 2245, 2328, 2355, 2694, 2910, 3140, 3592, 3768, 3880, 4490, 4710, 5388, 5820, 6280, 6735, 8980, 9420, 10776, 11640, 13470, 15229, 17960, 18840, 26940, 30458, 43553, 45687, 53880, 60916, 70493, 76145, 87106, 91374, 121832, 130659, 140986, 152290, 174212, 182748, 211479, 217765, 228435, 261318, 281972, 304580, 348424, 352465, 365496, 422958, 435530, 456870, 522636, 563944, 609160, 653295, 704930, 845916, 871060, 913740, 1045272, 1057395, 1306590, 1409860, 1691832, 1742120, 1827480, 2114790, 2613180, 2819720, 4229580, 5226360, 6837821, 8459160, 13675642, 20513463, 27351284, 34189105, 41026926, 54702568, 68378210, 82053852, 102567315, 136756420, 164107704, 205134630, 273512840, 410269260, 820538520]

約数ペア:

[(1, 820538520), (2, 410269260), (3, 273512840), (4, 205134630), (5, 164107704), (6, 136756420), (8, 102567315), (10, 82053852), (12, 68378210), (15, 54702568), (20, 41026926), (24, 34189105), (30, 27351284), (40, 20513463), (60, 13675642), (97, 8459160), (120, 6837821), (157, 5226360), (194, 4229580), (291, 2819720), (314, 2613180), (388, 2114790), (449, 1827480), (471, 1742120), (485, 1691832), (582, 1409860), (628, 1306590), (776, 1057395), (785, 1045272), (898, 913740), (942, 871060), (970, 845916), (1164, 704930), (1256, 653295), (1347, 609160), (1455, 563944), (1570, 522636), (1796, 456870), (1884, 435530), (1940, 422958), (2245, 365496), (2328, 352465), (2355, 348424), (2694, 304580), (2910, 281972), (3140, 261318), (3592, 228435), (3768, 217765), (3880, 211479), (4490, 182748), (4710, 174212), (5388, 152290), (5820, 140986), (6280, 130659), (6735, 121832), (8980, 91374), (9420, 87106), (10776, 76145), (11640, 70493), (13470, 60916), (15229, 53880), (17960, 45687), (18840, 43553), (26940, 30458)]