87120440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{389}}^1\times {\mathrm{509}}^1$

素因数の和:920

約数の個数: 64

約数和(自身を含む): 214812000

約数和(自身を除く): 127691560

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 389, 440, 509, 778, 1018, 1556, 1945, 2036, 2545, 3112, 3890, 4072, 4279, 5090, 5599, 7780, 8558, 10180, 11198, 15560, 17116, 20360, 21395, 22396, 27995, 34232, 42790, 44792, 55990, 85580, 111980, 171160, 198001, 223960, 396002, 792004, 990005, 1584008, 1980010, 2178011, 3960020, 4356022, 7920040, 8712044, 10890055, 17424088, 21780110, 43560220, 87120440]

約数ペア:

[(1, 87120440), (2, 43560220), (4, 21780110), (5, 17424088), (8, 10890055), (10, 8712044), (11, 7920040), (20, 4356022), (22, 3960020), (40, 2178011), (44, 1980010), (55, 1584008), (88, 990005), (110, 792004), (220, 396002), (389, 223960), (440, 198001), (509, 171160), (778, 111980), (1018, 85580), (1556, 55990), (1945, 44792), (2036, 42790), (2545, 34232), (3112, 27995), (3890, 22396), (4072, 21395), (4279, 20360), (5090, 17116), (5599, 15560), (7780, 11198), (8558, 10180)]