18402680

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{937}}^1$

素因数の和:1439

約数の個数: 32

約数和(自身を含む): 41534640

約数和(自身を除く): 23131960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 937, 982, 1874, 1964, 2455, 3748, 3928, 4685, 4910, 7496, 9370, 9820, 18740, 19640, 37480, 460067, 920134, 1840268, 2300335, 3680536, 4600670, 9201340, 18402680]

約数ペア:

[(1, 18402680), (2, 9201340), (4, 4600670), (5, 3680536), (8, 2300335), (10, 1840268), (20, 920134), (40, 460067), (491, 37480), (937, 19640), (982, 18740), (1874, 9820), (1964, 9370), (2455, 7496), (3748, 4910), (3928, 4685)]