291227139

素因数分解:

$3^2\times 7^2\times {\mathrm{660379}}^1$

素因数の和:660399

約数の個数: 18

約数和(自身を含む): 489341580

約数和(自身を除く): 198114441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 660379, 1981137, 4622653, 5943411, 13867959, 32358571, 41603877, 97075713, 291227139]

約数ペア:

[(1, 291227139), (3, 97075713), (7, 41603877), (9, 32358571), (21, 13867959), (49, 5943411), (63, 4622653), (147, 1981137), (441, 660379)]