20981040

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{87421}}^1$

素因数の和:87437

約数の個数: 40

約数和(自身を含む): 65041968

約数和(自身を除く): 44060928

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 87421, 174842, 262263, 349684, 437105, 524526, 699368, 874210, 1049052, 1311315, 1398736, 1748420, 2098104, 2622630, 3496840, 4196208, 5245260, 6993680, 10490520, 20981040]

約数ペア:

[(1, 20981040), (2, 10490520), (3, 6993680), (4, 5245260), (5, 4196208), (6, 3496840), (8, 2622630), (10, 2098104), (12, 1748420), (15, 1398736), (16, 1311315), (20, 1049052), (24, 874210), (30, 699368), (40, 524526), (48, 437105), (60, 349684), (80, 262263), (120, 174842), (240, 87421)]