209621516

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{310091}}^1$

素因数の和:310121

約数の個数: 18

約数和(自身を含む): 397227852

約数和(自身を除く): 187606336

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 310091, 620182, 1240364, 4031183, 8062366, 16124732, 52405379, 104810758, 209621516]

約数ペア:

[(1, 209621516), (2, 104810758), (4, 52405379), (13, 16124732), (26, 8062366), (52, 4031183), (169, 1240364), (338, 620182), (676, 310091)]