19991348

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{29573}}^1$

素因数の和:29603

約数の個数: 18

約数和(自身を含む): 37884294

約数和(自身を除く): 17892946

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 29573, 59146, 118292, 384449, 768898, 1537796, 4997837, 9995674, 19991348]

約数ペア:

[(1, 19991348), (2, 9995674), (4, 4997837), (13, 1537796), (26, 768898), (52, 384449), (169, 118292), (338, 59146), (676, 29573)]