90205780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{644327}}^1$

素因数の和:644343

約数の個数: 24

約数和(自身を含む): 216494208

約数和(自身を除く): 126288428

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 644327, 1288654, 2577308, 3221635, 4510289, 6443270, 9020578, 12886540, 18041156, 22551445, 45102890, 90205780]

約数ペア:

[(1, 90205780), (2, 45102890), (4, 22551445), (5, 18041156), (7, 12886540), (10, 9020578), (14, 6443270), (20, 4510289), (28, 3221635), (35, 2577308), (70, 1288654), (140, 644327)]