19871997

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{10531}}^1$

素因数の和:10588

約数の個数: 16

約数和(自身を含む): 28815552

約数和(自身を除く): 8943555

約数列:

[1, 3, 17, 37, 51, 111, 629, 1887, 10531, 31593, 179027, 389647, 537081, 1168941, 6623999, 19871997]

約数ペア:

[(1, 19871997), (3, 6623999), (17, 1168941), (37, 537081), (51, 389647), (111, 179027), (629, 31593), (1887, 10531)]