218978708

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{323933}}^1$

素因数の和:323963

約数の個数: 18

約数和(自身を含む): 414959454

約数和(自身を除く): 195980746

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 323933, 647866, 1295732, 4211129, 8422258, 16844516, 54744677, 109489354, 218978708]

約数ペア:

[(1, 218978708), (2, 109489354), (4, 54744677), (13, 16844516), (26, 8422258), (52, 4211129), (169, 1295732), (338, 647866), (676, 323933)]