21521680

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{14159}}^1$

素因数の和:14191

約数の個数: 40

約数和(自身を含む): 52675200

約数和(自身を除く): 31153520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 14159, 28318, 56636, 70795, 113272, 141590, 226544, 269021, 283180, 538042, 566360, 1076084, 1132720, 1345105, 2152168, 2690210, 4304336, 5380420, 10760840, 21521680]

約数ペア:

[(1, 21521680), (2, 10760840), (4, 5380420), (5, 4304336), (8, 2690210), (10, 2152168), (16, 1345105), (19, 1132720), (20, 1076084), (38, 566360), (40, 538042), (76, 283180), (80, 269021), (95, 226544), (152, 141590), (190, 113272), (304, 70795), (380, 56636), (760, 28318), (1520, 14159)]