21016989

素因数分解:

$3^4\times 7^1\times {\mathrm{101}}^1\times {\mathrm{367}}^1$

素因数の和:487

約数の個数: 40

約数和(自身を含む): 36334848

約数和(自身を除く): 15317859

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 101, 189, 303, 367, 567, 707, 909, 1101, 2121, 2569, 2727, 3303, 6363, 7707, 8181, 9909, 19089, 23121, 29727, 37067, 57267, 69363, 111201, 208089, 259469, 333603, 778407, 1000809, 2335221, 3002427, 7005663, 21016989]

約数ペア:

[(1, 21016989), (3, 7005663), (7, 3002427), (9, 2335221), (21, 1000809), (27, 778407), (63, 333603), (81, 259469), (101, 208089), (189, 111201), (303, 69363), (367, 57267), (567, 37067), (707, 29727), (909, 23121), (1101, 19089), (2121, 9909), (2569, 8181), (2727, 7707), (3303, 6363)]