21095529

素因数分解:

$3^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1$

素因数の和:139

約数の個数: 64

約数和(自身を含む): 37632000

約数和(自身を除く): 16536471

約数列:

[1, 3, 7, 13, 19, 21, 39, 49, 57, 83, 91, 133, 147, 247, 249, 273, 343, 399, 581, 637, 741, 931, 1029, 1079, 1577, 1729, 1743, 1911, 2793, 3237, 4067, 4459, 4731, 5187, 6517, 7553, 11039, 12103, 12201, 13377, 19551, 20501, 22659, 28469, 33117, 36309, 52871, 61503, 77273, 84721, 85407, 143507, 158613, 231819, 254163, 370097, 430521, 540911, 1004549, 1110291, 1622733, 3013647, 7031843, 21095529]

約数ペア:

[(1, 21095529), (3, 7031843), (7, 3013647), (13, 1622733), (19, 1110291), (21, 1004549), (39, 540911), (49, 430521), (57, 370097), (83, 254163), (91, 231819), (133, 158613), (147, 143507), (247, 85407), (249, 84721), (273, 77273), (343, 61503), (399, 52871), (581, 36309), (637, 33117), (741, 28469), (931, 22659), (1029, 20501), (1079, 19551), (1577, 13377), (1729, 12201), (1743, 12103), (1911, 11039), (2793, 7553), (3237, 6517), (4067, 5187), (4459, 4731)]