25687431

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{367}}^1$

素因数の和:492

約数の個数: 48

約数和(自身を含む): 46844928

約数和(自身を除く): 21157497

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 101, 231, 303, 367, 693, 707, 909, 1101, 1111, 2121, 2569, 3303, 3333, 4037, 6363, 7707, 7777, 9999, 12111, 23121, 23331, 28259, 36333, 37067, 69993, 84777, 111201, 254331, 259469, 333603, 407737, 778407, 1223211, 2335221, 2854159, 3669633, 8562477, 25687431]

約数ペア:

[(1, 25687431), (3, 8562477), (7, 3669633), (9, 2854159), (11, 2335221), (21, 1223211), (33, 778407), (63, 407737), (77, 333603), (99, 259469), (101, 254331), (231, 111201), (303, 84777), (367, 69993), (693, 37067), (707, 36333), (909, 28259), (1101, 23331), (1111, 23121), (2121, 12111), (2569, 9999), (3303, 7777), (3333, 7707), (4037, 6363)]