21181560

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{199}}^1\times {\mathrm{887}}^1$

素因数の和:1100

約数の個数: 64

約数和(自身を含む): 63936000

約数和(自身を除く): 42754440

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 199, 398, 597, 796, 887, 995, 1194, 1592, 1774, 1990, 2388, 2661, 2985, 3548, 3980, 4435, 4776, 5322, 5970, 7096, 7960, 8870, 10644, 11940, 13305, 17740, 21288, 23880, 26610, 35480, 53220, 106440, 176513, 353026, 529539, 706052, 882565, 1059078, 1412104, 1765130, 2118156, 2647695, 3530260, 4236312, 5295390, 7060520, 10590780, 21181560]

約数ペア:

[(1, 21181560), (2, 10590780), (3, 7060520), (4, 5295390), (5, 4236312), (6, 3530260), (8, 2647695), (10, 2118156), (12, 1765130), (15, 1412104), (20, 1059078), (24, 882565), (30, 706052), (40, 529539), (60, 353026), (120, 176513), (199, 106440), (398, 53220), (597, 35480), (796, 26610), (887, 23880), (995, 21288), (1194, 17740), (1592, 13305), (1774, 11940), (1990, 10644), (2388, 8870), (2661, 7960), (2985, 7096), (3548, 5970), (3980, 5322), (4435, 4776)]