209078541

素因数分解:

$3^2\times 7^2\times {\mathrm{474101}}^1$

素因数の和:474121

約数の個数: 18

約数和(自身を含む): 351309582

約数和(自身を除く): 142231041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 474101, 1422303, 3318707, 4266909, 9956121, 23230949, 29868363, 69692847, 209078541]

約数ペア:

[(1, 209078541), (3, 69692847), (7, 29868363), (9, 23230949), (21, 9956121), (49, 4266909), (63, 3318707), (147, 1422303), (441, 474101)]