20187156920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{287239}}^1$

素因数の和:287508

約数の個数: 64

約数和(自身を含む): 52116825600

約数和(自身を除く): 31929668680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 251, 280, 502, 1004, 1255, 1757, 2008, 2510, 3514, 5020, 7028, 8785, 10040, 14056, 17570, 35140, 70280, 287239, 574478, 1148956, 1436195, 2010673, 2297912, 2872390, 4021346, 5744780, 8042692, 10053365, 11489560, 16085384, 20106730, 40213460, 72096989, 80426920, 144193978, 288387956, 360484945, 504678923, 576775912, 720969890, 1009357846, 1441939780, 2018715692, 2523394615, 2883879560, 4037431384, 5046789230, 10093578460, 20187156920]

約数ペア:

[(1, 20187156920), (2, 10093578460), (4, 5046789230), (5, 4037431384), (7, 2883879560), (8, 2523394615), (10, 2018715692), (14, 1441939780), (20, 1009357846), (28, 720969890), (35, 576775912), (40, 504678923), (56, 360484945), (70, 288387956), (140, 144193978), (251, 80426920), (280, 72096989), (502, 40213460), (1004, 20106730), (1255, 16085384), (1757, 11489560), (2008, 10053365), (2510, 8042692), (3514, 5744780), (5020, 4021346), (7028, 2872390), (8785, 2297912), (10040, 2010673), (14056, 1436195), (17570, 1148956), (35140, 574478), (70280, 287239)]