19981870

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{68903}}^1$

素因数の和:68939

約数の個数: 16

約数和(自身を含む): 37208160

約数和(自身を除く): 17226290

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 68903, 137806, 344515, 689030, 1998187, 3996374, 9990935, 19981870]

約数ペア:

[(1, 19981870), (2, 9990935), (5, 3996374), (10, 1998187), (29, 689030), (58, 344515), (145, 137806), (290, 68903)]