80340560

素因数分解:

$2^4\times 5^1\times {\mathrm{509}}^1\times {\mathrm{1973}}^1$

素因数の和:2495

約数の個数: 40

約数和(自身を含む): 187253640

約数和(自身を除く): 106913080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 509, 1018, 1973, 2036, 2545, 3946, 4072, 5090, 7892, 8144, 9865, 10180, 15784, 19730, 20360, 31568, 39460, 40720, 78920, 157840, 1004257, 2008514, 4017028, 5021285, 8034056, 10042570, 16068112, 20085140, 40170280, 80340560]

約数ペア:

[(1, 80340560), (2, 40170280), (4, 20085140), (5, 16068112), (8, 10042570), (10, 8034056), (16, 5021285), (20, 4017028), (40, 2008514), (80, 1004257), (509, 157840), (1018, 78920), (1973, 40720), (2036, 39460), (2545, 31568), (3946, 20360), (4072, 19730), (5090, 15784), (7892, 10180), (8144, 9865)]