21204057

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{2797}}^1$

素因数の和:2845

約数の個数: 24

約数和(自身を含む): 34113216

約数和(自身を除く): 12909159

約数列:

[1, 3, 7, 19, 21, 57, 133, 361, 399, 1083, 2527, 2797, 7581, 8391, 19579, 53143, 58737, 159429, 372001, 1009717, 1116003, 3029151, 7068019, 21204057]

約数ペア:

[(1, 21204057), (3, 7068019), (7, 3029151), (19, 1116003), (21, 1009717), (57, 372001), (133, 159429), (361, 58737), (399, 53143), (1083, 19579), (2527, 8391), (2797, 7581)]