18456820

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{10369}}^1$

素因数の和:10467

約数の個数: 24

約数和(自身を含む): 39198600

約数和(自身を除く): 20741780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 10369, 20738, 41476, 51845, 103690, 207380, 922841, 1845682, 3691364, 4614205, 9228410, 18456820]

約数ペア:

[(1, 18456820), (2, 9228410), (4, 4614205), (5, 3691364), (10, 1845682), (20, 922841), (89, 207380), (178, 103690), (356, 51845), (445, 41476), (890, 20738), (1780, 10369)]