21615027

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:216

約数の個数: 48

約数和(自身を含む): 36115200

約数和(自身を除く): 14500173

約数列:

[1, 3, 7, 19, 21, 49, 57, 71, 109, 133, 147, 213, 327, 399, 497, 763, 931, 1349, 1491, 2071, 2289, 2793, 3479, 4047, 5341, 6213, 7739, 9443, 10437, 14497, 16023, 23217, 28329, 43491, 54173, 66101, 101479, 147041, 162519, 198303, 304437, 379211, 441123, 1029287, 1137633, 3087861, 7205009, 21615027]

約数ペア:

[(1, 21615027), (3, 7205009), (7, 3087861), (19, 1137633), (21, 1029287), (49, 441123), (57, 379211), (71, 304437), (109, 198303), (133, 162519), (147, 147041), (213, 101479), (327, 66101), (399, 54173), (497, 43491), (763, 28329), (931, 23217), (1349, 16023), (1491, 14497), (2071, 10437), (2289, 9443), (2793, 7739), (3479, 6213), (4047, 5341)]