21447839

素因数分解:

$7^2\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1$

素因数の和:267

約数の個数: 24

約数和(自身を含む): 26046720

約数和(自身を除く): 4598881

約数列:

[1, 7, 47, 49, 67, 139, 329, 469, 973, 2303, 3149, 3283, 6533, 6811, 9313, 22043, 45731, 65191, 154301, 320117, 437711, 456337, 3063977, 21447839]

約数ペア:

[(1, 21447839), (7, 3063977), (47, 456337), (49, 437711), (67, 320117), (139, 154301), (329, 65191), (469, 45731), (973, 22043), (2303, 9313), (3149, 6811), (3283, 6533)]